def test_simplifications():
x = Symbol('x')
assert sinh(asinh(x)) == x
assert sinh(acosh(x)) == sqrt(x - 1) * sqrt(x + 1)
assert sinh(atanh(x)) == x/sqrt(1 - x**2)
assert sinh(acoth(x)) == 1/(sqrt(x - 1) * sqrt(x + 1))
assert cosh(asinh(x)) == sqrt(1 + x**2)
assert cosh(acosh(x)) == x
assert cosh(atanh(x)) == 1/sqrt(1 - x**2)
assert cosh(acoth(x)) == x/(sqrt(x - 1) * sqrt(x + 1))
assert tanh(asinh(x)) == x/sqrt(1 + x**2)
assert tanh(acosh(x)) == sqrt(x - 1) * sqrt(x + 1) / x
assert tanh(atanh(x)) == x
assert tanh(acoth(x)) == 1/x
assert coth(asinh(x)) == sqrt(1 + x**2)/x
assert coth(acosh(x)) == x/(sqrt(x - 1) * sqrt(x + 1))
assert coth(atanh(x)) == 1/x
assert coth(acoth(x)) == x
assert csch(asinh(x)) == 1/x
assert csch(acosh(x)) == 1/(sqrt(x - 1) * sqrt(x + 1))
assert csch(atanh(x)) == sqrt(1 - x**2)/x
assert csch(acoth(x)) == sqrt(x - 1) * sqrt(x + 1)
assert sech(asinh(x)) == 1/sqrt(1 + x**2)
assert sech(acosh(x)) == 1/x
assert sech(atanh(x)) == sqrt(1 - x**2)
assert sech(acoth(x)) == sqrt(x - 1) * sqrt(x + 1)/x
def test_hyper_as_trig():
from sympy.simplify.fu import _osborne as o, _osbornei as i, TR12
eq = sinh(x)**2 + cosh(x)**2
t, f = hyper_as_trig(eq)
assert f(fu(t)) == cosh(2*x)
e, f = hyper_as_trig(tanh(x + y))
assert f(TR12(e)) == (tanh(x) + tanh(y))/(tanh(x)*tanh(y) + 1)
d = Dummy()
assert o(sinh(x), d) == I*sin(x*d)
assert o(tanh(x), d) == I*tan(x*d)
assert o(coth(x), d) == cot(x*d)/I
assert o(cosh(x), d) == cos(x*d)
assert o(sech(x), d) == sec(x*d)
assert o(csch(x), d) == csc(x*d)/I
for func in (sinh, cosh, tanh, coth, sech, csch):
h = func(pi)
assert i(o(h, d), d) == h
# /!\ the _osborne functions are not meant to work
# in the o(i(trig, d), d) direction so we just check
# that they work as they are supposed to work
assert i(cos(x*y + z), y) == cosh(x + z*I)
assert i(sin(x*y + z), y) == sinh(x + z*I)/I
assert i(tan(x*y + z), y) == tanh(x + z*I)/I
assert i(cot(x*y + z), y) == coth(x + z*I)*I
assert i(sec(x*y + z), y) == sech(x + z*I)
assert i(csc(x*y + z), y) == csch(x + z*I)*I
def test_simplifications():
x = Symbol('x')
assert sinh(asinh(x)) == x
assert sinh(acosh(x)) == sqrt(x - 1) * sqrt(x + 1)
assert sinh(atanh(x)) == x / sqrt(1 - x**2)
assert sinh(acoth(x)) == 1 / (sqrt(x - 1) * sqrt(x + 1))
assert cosh(asinh(x)) == sqrt(1 + x**2)
assert cosh(acosh(x)) == x
assert cosh(atanh(x)) == 1 / sqrt(1 - x**2)
assert cosh(acoth(x)) == x / (sqrt(x - 1) * sqrt(x + 1))
assert tanh(asinh(x)) == x / sqrt(1 + x**2)
assert tanh(acosh(x)) == sqrt(x - 1) * sqrt(x + 1) / x
assert tanh(atanh(x)) == x
assert tanh(acoth(x)) == 1 / x
assert coth(asinh(x)) == sqrt(1 + x**2) / x
assert coth(acosh(x)) == x / (sqrt(x - 1) * sqrt(x + 1))
assert coth(atanh(x)) == 1 / x
assert coth(acoth(x)) == x
assert csch(asinh(x)) == 1 / x
assert csch(acosh(x)) == 1 / (sqrt(x - 1) * sqrt(x + 1))
assert csch(atanh(x)) == sqrt(1 - x**2) / x
assert csch(acoth(x)) == sqrt(x - 1) * sqrt(x + 1)
assert sech(asinh(x)) == 1 / sqrt(1 + x**2)
assert sech(acosh(x)) == 1 / x
assert sech(atanh(x)) == sqrt(1 - x**2)
assert sech(acoth(x)) == sqrt(x - 1) * sqrt(x + 1) / x
def test_hyper_as_trig():
from sympy.simplify.fu import _osborne as o, _osbornei as i, TR12
eq = sinh(x)**2 + cosh(x)**2
t, f = hyper_as_trig(eq)
assert f(fu(t)) == cosh(2 * x)
e, f = hyper_as_trig(tanh(x + y))
assert f(TR12(e)) == (tanh(x) + tanh(y)) / (tanh(x) * tanh(y) + 1)
d = Dummy()
assert o(sinh(x), d) == I * sin(x * d)
assert o(tanh(x), d) == I * tan(x * d)
assert o(coth(x), d) == cot(x * d) / I
assert o(cosh(x), d) == cos(x * d)
assert o(sech(x), d) == sec(x * d)
assert o(csch(x), d) == csc(x * d) / I
for func in (sinh, cosh, tanh, coth, sech, csch):
h = func(pi)
assert i(o(h, d), d) == h
# /!\ the _osborne functions are not meant to work
# in the o(i(trig, d), d) direction so we just check
# that they work as they are supposed to work
assert i(cos(x * y + z), y) == cosh(x + z * I)
assert i(sin(x * y + z), y) == sinh(x + z * I) / I
assert i(tan(x * y + z), y) == tanh(x + z * I) / I
assert i(cot(x * y + z), y) == coth(x + z * I) * I
assert i(sec(x * y + z), y) == sech(x + z * I)
assert i(csc(x * y + z), y) == csch(x + z * I) * I
def test_csch_rewrite():
x = Symbol("x")
assert csch(x).rewrite(exp) == 1 / (exp(x) / 2 - exp(-x) / 2) == csch(x).rewrite("tractable")
assert csch(x).rewrite(cosh) == I / cosh(x + I * pi / 2)
tanh_half = tanh(S.Half * x)
assert csch(x).rewrite(tanh) == (1 - tanh_half ** 2) / (2 * tanh_half)
coth_half = coth(S.Half * x)
assert csch(x).rewrite(coth) == (coth_half ** 2 - 1) / (2 * coth_half)
def test_acsch():
x = Symbol('x')
assert unchanged(acsch, x)
assert acsch(-x) == -acsch(x)
# values at fixed points
assert acsch(1) == log(1 + sqrt(2))
assert acsch(-1) == - log(1 + sqrt(2))
assert acsch(0) is zoo
assert acsch(2) == log((1+sqrt(5))/2)
assert acsch(-2) == - log((1+sqrt(5))/2)
assert acsch(I) == - I*pi/2
assert acsch(-I) == I*pi/2
assert acsch(-I*(sqrt(6) + sqrt(2))) == I*pi / 12
assert acsch(I*(sqrt(2) + sqrt(6))) == -I*pi / 12
assert acsch(-I*(1 + sqrt(5))) == I*pi / 10
assert acsch(I*(1 + sqrt(5))) == -I*pi / 10
assert acsch(-I*2 / sqrt(2 - sqrt(2))) == I*pi / 8
assert acsch(I*2 / sqrt(2 - sqrt(2))) == -I*pi / 8
assert acsch(-I*2) == I*pi / 6
assert acsch(I*2) == -I*pi / 6
assert acsch(-I*sqrt(2 + 2/sqrt(5))) == I*pi / 5
assert acsch(I*sqrt(2 + 2/sqrt(5))) == -I*pi / 5
assert acsch(-I*sqrt(2)) == I*pi / 4
assert acsch(I*sqrt(2)) == -I*pi / 4
assert acsch(-I*(sqrt(5)-1)) == 3*I*pi / 10
assert acsch(I*(sqrt(5)-1)) == -3*I*pi / 10
assert acsch(-I*2 / sqrt(3)) == I*pi / 3
assert acsch(I*2 / sqrt(3)) == -I*pi / 3
assert acsch(-I*2 / sqrt(2 + sqrt(2))) == 3*I*pi / 8
assert acsch(I*2 / sqrt(2 + sqrt(2))) == -3*I*pi / 8
assert acsch(-I*sqrt(2 - 2/sqrt(5))) == 2*I*pi / 5
assert acsch(I*sqrt(2 - 2/sqrt(5))) == -2*I*pi / 5
assert acsch(-I*(sqrt(6) - sqrt(2))) == 5*I*pi / 12
assert acsch(I*(sqrt(6) - sqrt(2))) == -5*I*pi / 12
assert acsch(nan) is nan
# properties
# acsch(x) == asinh(1/x)
assert acsch(-I*sqrt(2)) == asinh(I/sqrt(2))
assert acsch(-I*2 / sqrt(3)) == asinh(I*sqrt(3) / 2)
# acsch(x) == -I*asin(I/x)
assert acsch(-I*sqrt(2)) == -I*asin(-1/sqrt(2))
assert acsch(-I*2 / sqrt(3)) == -I*asin(-sqrt(3)/2)
# csch(acsch(x)) / x == 1
assert expand_mul(csch(acsch(-I*(sqrt(6) + sqrt(2)))) / (-I*(sqrt(6) + sqrt(2)))) == 1
assert expand_mul(csch(acsch(I*(1 + sqrt(5)))) / ((I*(1 + sqrt(5))))) == 1
assert (csch(acsch(I*sqrt(2 - 2/sqrt(5)))) / (I*sqrt(2 - 2/sqrt(5)))).simplify() == 1
assert (csch(acsch(-I*sqrt(2 - 2/sqrt(5)))) / (-I*sqrt(2 - 2/sqrt(5)))).simplify() == 1
# numerical evaluation
assert str(acsch(5*I+1).n(6)) == '0.0391819 - 0.193363*I'
assert str(acsch(-5*I+1).n(6)) == '0.0391819 + 0.193363*I'
def test_csch_rewrite():
x = Symbol('x')
assert csch(x).rewrite(exp) == 1 / (exp(x)/2 - exp(-x)/2) \
== csch(x).rewrite('tractable')
assert csch(x).rewrite(cosh) == I / cosh(x + I * pi / 2)
tanh_half = tanh(S.Half * x)
assert csch(x).rewrite(tanh) == (1 - tanh_half**2) / (2 * tanh_half)
coth_half = coth(S.Half * x)
assert csch(x).rewrite(coth) == (coth_half**2 - 1) / (2 * coth_half)
def test_acsch():
x = Symbol('x')
assert acsch(-x) == acsch(-x)
assert acsch(x) == -acsch(-x)
# values at fixed points
assert acsch(1) == log(1 + sqrt(2))
assert acsch(-1) == - log(1 + sqrt(2))
assert acsch(0) == zoo
assert acsch(2) == log((1+sqrt(5))/2)
assert acsch(-2) == - log((1+sqrt(5))/2)
assert acsch(I) == - I*pi/2
assert acsch(-I) == I*pi/2
assert acsch(-I*(sqrt(6) + sqrt(2))) == I*pi / 12
assert acsch(I*(sqrt(2) + sqrt(6))) == -I*pi / 12
assert acsch(-I*(1 + sqrt(5))) == I*pi / 10
assert acsch(I*(1 + sqrt(5))) == -I*pi / 10
assert acsch(-I*2 / sqrt(2 - sqrt(2))) == I*pi / 8
assert acsch(I*2 / sqrt(2 - sqrt(2))) == -I*pi / 8
assert acsch(-I*2) == I*pi / 6
assert acsch(I*2) == -I*pi / 6
assert acsch(-I*sqrt(2 + 2/sqrt(5))) == I*pi / 5
assert acsch(I*sqrt(2 + 2/sqrt(5))) == -I*pi / 5
assert acsch(-I*sqrt(2)) == I*pi / 4
assert acsch(I*sqrt(2)) == -I*pi / 4
assert acsch(-I*(sqrt(5)-1)) == 3*I*pi / 10
assert acsch(I*(sqrt(5)-1)) == -3*I*pi / 10
assert acsch(-I*2 / sqrt(3)) == I*pi / 3
assert acsch(I*2 / sqrt(3)) == -I*pi / 3
assert acsch(-I*2 / sqrt(2 + sqrt(2))) == 3*I*pi / 8
assert acsch(I*2 / sqrt(2 + sqrt(2))) == -3*I*pi / 8
assert acsch(-I*sqrt(2 - 2/sqrt(5))) == 2*I*pi / 5
assert acsch(I*sqrt(2 - 2/sqrt(5))) == -2*I*pi / 5
assert acsch(-I*(sqrt(6) - sqrt(2))) == 5*I*pi / 12
assert acsch(I*(sqrt(6) - sqrt(2))) == -5*I*pi / 12
# properties
# acsch(x) == asinh(1/x)
assert acsch(-I*sqrt(2)) == asinh(I/sqrt(2))
assert acsch(-I*2 / sqrt(3)) == asinh(I*sqrt(3) / 2)
# acsch(x) == -I*asin(I/x)
assert acsch(-I*sqrt(2)) == -I*asin(-1/sqrt(2))
assert acsch(-I*2 / sqrt(3)) == -I*asin(-sqrt(3)/2)
# csch(acsch(x)) / x == 1
assert expand_mul(csch(acsch(-I*(sqrt(6) + sqrt(2)))) / (-I*(sqrt(6) + sqrt(2)))) == 1
assert expand_mul(csch(acsch(I*(1 + sqrt(5)))) / ((I*(1 + sqrt(5))))) == 1
assert (csch(acsch(I*sqrt(2 - 2/sqrt(5)))) / (I*sqrt(2 - 2/sqrt(5)))).simplify() == 1
assert (csch(acsch(-I*sqrt(2 - 2/sqrt(5)))) / (-I*sqrt(2 - 2/sqrt(5)))).simplify() == 1
# numerical evaluation
assert str(acsch(5*I+1).n(6)) == '0.0391819 - 0.193363*I'
assert str(acsch(-5*I+1).n(6)) == '0.0391819 + 0.193363*I'
def test_derivs():
x = Symbol('x')
assert coth(x).diff(x) == -sinh(x)**(-2)
assert sinh(x).diff(x) == cosh(x)
assert cosh(x).diff(x) == sinh(x)
assert tanh(x).diff(x) == -tanh(x)**2 + 1
assert csch(x).diff(x) == -coth(x)*csch(x)
assert sech(x).diff(x) == -tanh(x)*sech(x)
assert acoth(x).diff(x) == 1/(-x**2 + 1)
assert asinh(x).diff(x) == 1/sqrt(x**2 + 1)
assert acosh(x).diff(x) == 1/sqrt(x**2 - 1)
assert atanh(x).diff(x) == 1/(-x**2 + 1)
def test_derivs():
x = Symbol("x")
assert coth(x).diff(x) == -sinh(x) ** (-2)
assert sinh(x).diff(x) == cosh(x)
assert cosh(x).diff(x) == sinh(x)
assert tanh(x).diff(x) == -tanh(x) ** 2 + 1
assert csch(x).diff(x) == -coth(x) * csch(x)
assert sech(x).diff(x) == -tanh(x) * sech(x)
assert acoth(x).diff(x) == 1 / (-(x ** 2) + 1)
assert asinh(x).diff(x) == 1 / sqrt(x ** 2 + 1)
assert acosh(x).diff(x) == 1 / sqrt(x ** 2 - 1)
assert atanh(x).diff(x) == 1 / (-(x ** 2) + 1)
assert asech(x).diff(x) == -1 / (x * sqrt(1 - x ** 2))
assert acsch(x).diff(x) == -1 / (x ** 2 * sqrt(1 + x ** (-2)))
def test_sign_assumptions():
p = Symbol('p', positive=True)
n = Symbol('n', negative=True)
assert sinh(n).is_negative is True
assert sinh(p).is_positive is True
assert cosh(n).is_positive is True
assert cosh(p).is_positive is True
assert tanh(n).is_negative is True
assert tanh(p).is_positive is True
assert csch(n).is_negative is True
assert csch(p).is_positive is True
assert sech(n).is_positive is True
assert sech(p).is_positive is True
assert coth(n).is_negative is True
assert coth(p).is_positive is True
def test_sign_assumptions():
p = Symbol('p', positive=True)
n = Symbol('n', negative=True)
assert sinh(n).is_negative is True
assert sinh(p).is_positive is True
assert cosh(n).is_positive is True
assert cosh(p).is_positive is True
assert tanh(n).is_negative is True
assert tanh(p).is_positive is True
assert csch(n).is_negative is True
assert csch(p).is_positive is True
assert sech(n).is_positive is True
assert sech(p).is_positive is True
assert coth(n).is_negative is True
assert coth(p).is_positive is True
def csch(self, value):
"""
Verilen değeri kullanarak, sumpy.csch döndürür
:param value: değer
:return: sympy.csch
"""
return sp.csch(value_checker(value))
def test_trig_functions(self, printer, x):
# Trig functions
assert printer.doprint(sp.acos(x)) == 'acos(x)'
assert printer.doprint(sp.acosh(x)) == 'acosh(x)'
assert printer.doprint(sp.asin(x)) == 'asin(x)'
assert printer.doprint(sp.asinh(x)) == 'asinh(x)'
assert printer.doprint(sp.atan(x)) == 'atan(x)'
assert printer.doprint(sp.atanh(x)) == 'atanh(x)'
assert printer.doprint(sp.ceiling(x)) == 'ceil(x)'
assert printer.doprint(sp.cos(x)) == 'cos(x)'
assert printer.doprint(sp.cosh(x)) == 'cosh(x)'
assert printer.doprint(sp.exp(x)) == 'exp(x)'
assert printer.doprint(sp.factorial(x)) == 'factorial(x)'
assert printer.doprint(sp.floor(x)) == 'floor(x)'
assert printer.doprint(sp.log(x)) == 'log(x)'
assert printer.doprint(sp.sin(x)) == 'sin(x)'
assert printer.doprint(sp.sinh(x)) == 'sinh(x)'
assert printer.doprint(sp.tan(x)) == 'tan(x)'
assert printer.doprint(sp.tanh(x)) == 'tanh(x)'
# extra trig functions
assert printer.doprint(sp.sec(x)) == '1 / cos(x)'
assert printer.doprint(sp.csc(x)) == '1 / sin(x)'
assert printer.doprint(sp.cot(x)) == '1 / tan(x)'
assert printer.doprint(sp.asec(x)) == 'acos(1 / x)'
assert printer.doprint(sp.acsc(x)) == 'asin(1 / x)'
assert printer.doprint(sp.acot(x)) == 'atan(1 / x)'
assert printer.doprint(sp.sech(x)) == '1 / cosh(x)'
assert printer.doprint(sp.csch(x)) == '1 / sinh(x)'
assert printer.doprint(sp.coth(x)) == '1 / tanh(x)'
assert printer.doprint(sp.asech(x)) == 'acosh(1 / x)'
assert printer.doprint(sp.acsch(x)) == 'asinh(1 / x)'
assert printer.doprint(sp.acoth(x)) == 'atanh(1 / x)'
def test_csch_series():
x = Symbol("x")
assert csch(x).series(
x, 0, 10
) == 1 / x - x / 6 + 7 * x ** 3 / 360 - 31 * x ** 5 / 15120 + 127 * x ** 7 / 604800 - 73 * x ** 9 / 3421440 + O(
x ** 10
)
def test_complex():
a, b = symbols("a,b", real=True)
z = a + b * I
for func in [sinh, cosh, tanh, coth, sech, csch]:
assert func(z).conjugate() == func(a - b * I)
for deep in [True, False]:
assert sinh(z).expand(complex=True, deep=deep) == sinh(a) * cos(b) + I * cosh(
a
) * sin(b)
assert cosh(z).expand(complex=True, deep=deep) == cosh(a) * cos(b) + I * sinh(
a
) * sin(b)
assert tanh(z).expand(complex=True, deep=deep) == sinh(a) * cosh(a) / (
cos(b) ** 2 + sinh(a) ** 2
) + I * sin(b) * cos(b) / (cos(b) ** 2 + sinh(a) ** 2)
assert coth(z).expand(complex=True, deep=deep) == sinh(a) * cosh(a) / (
sin(b) ** 2 + sinh(a) ** 2
) - I * sin(b) * cos(b) / (sin(b) ** 2 + sinh(a) ** 2)
assert csch(z).expand(complex=True, deep=deep) == cos(b) * sinh(a) / (
sin(b) ** 2 * cosh(a) ** 2 + cos(b) ** 2 * sinh(a) ** 2
) - I * sin(b) * cosh(a) / (
sin(b) ** 2 * cosh(a) ** 2 + cos(b) ** 2 * sinh(a) ** 2
)
assert sech(z).expand(complex=True, deep=deep) == cos(b) * cosh(a) / (
sin(b) ** 2 * sinh(a) ** 2 + cos(b) ** 2 * cosh(a) ** 2
) - I * sin(b) * sinh(a) / (
sin(b) ** 2 * sinh(a) ** 2 + cos(b) ** 2 * cosh(a) ** 2
)
def test_csch_series():
x = Symbol("x")
assert csch(x).series(
x, 0, 10
) == 1 / x - x / 6 + 7 * x ** 3 / 360 - 31 * x ** 5 / 15120 + 127 * x ** 7 / 604800 - 73 * x ** 9 / 3421440 + O(
x ** 10
)
def test_real_assumptions():
z = Symbol('z', real=False)
assert sinh(z).is_real is None
assert cosh(z).is_real is None
assert tanh(z).is_real is None
assert sech(z).is_real is None
assert csch(z).is_real is None
assert coth(z).is_real is None
def test_real_assumptions():
z = Symbol('z', real=False)
assert sinh(z).is_real is None
assert cosh(z).is_real is None
assert tanh(z).is_real is None
assert sech(z).is_real is None
assert csch(z).is_real is None
assert coth(z).is_real is None
def test_complex():
a, b = symbols('a,b', real=True)
z = a + b*I
for func in [sinh, cosh, tanh, coth, sech, csch]:
assert func(z).conjugate() == func(a - b*I)
for deep in [True, False]:
assert sinh(z).expand(
complex=True, deep=deep) == sinh(a)*cos(b) + I*cosh(a)*sin(b)
assert cosh(z).expand(
complex=True, deep=deep) == cosh(a)*cos(b) + I*sinh(a)*sin(b)
assert tanh(z).expand(complex=True, deep=deep) == sinh(a)*cosh(
a)/(cos(b)**2 + sinh(a)**2) + I*sin(b)*cos(b)/(cos(b)**2 + sinh(a)**2)
assert coth(z).expand(complex=True, deep=deep) == sinh(a)*cosh(
a)/(sin(b)**2 + sinh(a)**2) - I*sin(b)*cos(b)/(sin(b)**2 + sinh(a)**2)
assert csch(z).expand(complex=True, deep=deep) == cos(b) * sinh(a) / (sin(b)**2\
*cosh(a)**2 + cos(b)**2 * sinh(a)**2) - I*sin(b) * cosh(a) / (sin(b)**2\
*cosh(a)**2 + cos(b)**2 * sinh(a)**2)
assert sech(z).expand(complex=True, deep=deep) == cos(b) * cosh(a) / (sin(b)**2\
*sinh(a)**2 + cos(b)**2 * cosh(a)**2) - I*sin(b) * sinh(a) / (sin(b)**2\
*sinh(a)**2 + cos(b)**2 * cosh(a)**2)
def test_issue_13474():
x = Symbol('x')
assert simplify(x + csch(sinc(1))) == x + csch(sinc(1))
def test_issue_13474():
x = Symbol('x')
assert simplify(x + csch(sinc(1))) == x + csch(sinc(1))
def test_csch_fdiff():
x = Symbol('x')
raises(ArgumentIndexError, lambda: csch(x).fdiff(2))
def test_csch():
x, y = symbols('x,y')
k = Symbol('k', integer=True)
n = Symbol('n', positive=True)
assert csch(nan) == nan
assert csch(zoo) == nan
assert csch(oo) == 0
assert csch(-oo) == 0
assert csch(0) == zoo
assert csch(-1) == -csch(1)
assert csch(-x) == -csch(x)
assert csch(-pi) == -csch(pi)
assert csch(-2**1024 * E) == -csch(2**1024 * E)
assert csch(pi * I) == zoo
assert csch(-pi * I) == zoo
assert csch(2 * pi * I) == zoo
assert csch(-2 * pi * I) == zoo
assert csch(-3 * 10**73 * pi * I) == zoo
assert csch(7 * 10**103 * pi * I) == zoo
assert csch(pi * I / 2) == -I
assert csch(-pi * I / 2) == I
assert csch(5 * pi * I / 2) == -I
assert csch(7 * pi * I / 2) == I
assert csch(pi * I / 3) == -2 / sqrt(3) * I
assert csch(-2 * pi * I / 3) == 2 / sqrt(3) * I
assert csch(pi * I / 4) == -sqrt(2) * I
assert csch(-pi * I / 4) == sqrt(2) * I
assert csch(7 * pi * I / 4) == sqrt(2) * I
assert csch(-3 * pi * I / 4) == sqrt(2) * I
assert csch(pi * I / 6) == -2 * I
assert csch(-pi * I / 6) == 2 * I
assert csch(7 * pi * I / 6) == 2 * I
assert csch(-7 * pi * I / 6) == -2 * I
assert csch(-5 * pi * I / 6) == 2 * I
assert csch(pi * I / 105) == -1 / sin(pi / 105) * I
assert csch(-pi * I / 105) == 1 / sin(pi / 105) * I
assert csch(x * I) == -1 / sin(x) * I
assert csch(k * pi * I) == zoo
assert csch(17 * k * pi * I) == zoo
assert csch(k * pi * I / 2) == -1 / sin(k * pi / 2) * I
assert csch(n).is_real is True
sp.tan(num) # tangente
sp.cot(num) # cotangente
sp.sec(num) # secante
sp.csc(num) # cosecante
sp.asin(num) # Arcoseno
sp.acos(num) # Arcocoseno
sp.atan(num) # Arcotangente
sp.atan2(catetoY,
catetoX) # Arcotangente de un triangulo segun los catetos (Angulo)
sp.acot(num) # Arcocotangente
sp.asec(num) # Arcosecante
sp.acsc(num) # Arcocosecante
# Funciones hiperbólicas (Angulos en radianes)
sp.sinh(num) # Seno
sp.cosh(num) # Coseno
sp.tanh(num) # tangente
sp.coth(num) # cotangente
sp.sech(num) # secante
sp.csch(num) # cosecante
sp.asinh(num) # Arcoseno
sp.acosh(num) # Arcocoseno
sp.atanh(num) # Arcotangente
sp.acoth(num) # Arcocotangente
sp.asech(num) # Arcosecante
sp.acsch(num) # Arcocosecante
# Combinatoria
sp.factorial(num) # Factorial
sp.functions.combinatorial.numbers.nP(num1, num2) # Permutación
sp.functions.combinatorial.numbers.nC(num1, num2) # Combinación
# These LaTeX strings should parse to the corresponding SymPy expression
GOOD_PAIRS = [("0", 0), ("1", 1), ("-3.14", _Mul(-1, 3.14)),
("(-7.13)(1.5)", _Mul(_Mul(-1, 7.13), 1.5)), ("x", x),
("2x", 2 * x), ("x^2", x**2), ("x^{3 + 1}", x**_Add(3, 1)),
("-c", -c), ("a \\cdot b", a * b), ("a / b", a / b),
("a \\div b", a / b), ("a + b", a + b),
("a + b - a", _Add(a + b, -a)),
("a^2 + b^2 = c^2", Eq(a**2 + b**2, c**2)),
("\\sin \\theta", sin(theta)), ("\\sin(\\theta)", sin(theta)),
("\\sin^{-1} a", asin(a)),
("\\sin a \\cos b", _Mul(sin(a), cos(b))),
("\\sin \\cos \\theta", sin(cos(theta))),
("\\sin(\\cos \\theta)", sin(cos(theta))),
("\\csch^2(\\theta)", csch(theta)**2), ("\\frac{a}{b}", a / b),
("\\frac{a + b}{c}", _Mul(a + b, _Pow(c, -1))),
("\\frac{7}{3}", _Mul(7, _Pow(3, -1))),
("(\\csc x)(\\sec y)", csc(x) * sec(y)),
("\\lim_{x \\to 3} a", Limit(a, x, 3)),
("\\lim_{x \\rightarrow 3} a", Limit(a, x, 3)),
("\\lim_{x \\Rightarrow 3} a", Limit(a, x, 3)),
("\\lim_{x \\longrightarrow 3} a", Limit(a, x, 3)),
("\\lim_{x \\Longrightarrow 3} a", Limit(a, x, 3)),
("\\lim_{x \\to 3^{+}} a", Limit(a, x, 3, dir='+')),
("\\lim_{x \\to 3^{-}} a", Limit(a, x, 3, dir='-')),
("\\infty", oo),
("\\lim_{x \\to \\infty} \\frac{1}{x}",
Limit(_Mul(1, _Pow(x, -1)), x, oo)),
("\\frac{d}{dx} x", Derivative(x, x)),
("\\frac{d}{dt} x", Derivative(x, t)), ("f(x)", f(x)),
def test_csch():
x, y = symbols('x,y')
k = Symbol('k', integer=True)
n = Symbol('n', positive=True)
assert csch(nan) is nan
assert csch(zoo) is nan
assert csch(oo) == 0
assert csch(-oo) == 0
assert csch(0) is zoo
assert csch(-1) == -csch(1)
assert csch(-x) == -csch(x)
assert csch(-pi) == -csch(pi)
assert csch(-2**1024 * E) == -csch(2**1024 * E)
assert csch(pi * I) is zoo
assert csch(-pi * I) is zoo
assert csch(2 * pi * I) is zoo
assert csch(-2 * pi * I) is zoo
assert csch(-3 * 10**73 * pi * I) is zoo
assert csch(7 * 10**103 * pi * I) is zoo
assert csch(pi * I / 2) == -I
assert csch(-pi * I / 2) == I
assert csch(pi * I * Rational(5, 2)) == -I
assert csch(pi * I * Rational(7, 2)) == I
assert csch(pi * I / 3) == -2 / sqrt(3) * I
assert csch(pi * I * Rational(-2, 3)) == 2 / sqrt(3) * I
assert csch(pi * I / 4) == -sqrt(2) * I
assert csch(-pi * I / 4) == sqrt(2) * I
assert csch(pi * I * Rational(7, 4)) == sqrt(2) * I
assert csch(pi * I * Rational(-3, 4)) == sqrt(2) * I
assert csch(pi * I / 6) == -2 * I
assert csch(-pi * I / 6) == 2 * I
assert csch(pi * I * Rational(7, 6)) == 2 * I
assert csch(pi * I * Rational(-7, 6)) == -2 * I
assert csch(pi * I * Rational(-5, 6)) == 2 * I
assert csch(pi * I / 105) == -1 / sin(pi / 105) * I
assert csch(-pi * I / 105) == 1 / sin(pi / 105) * I
assert csch(x * I) == -1 / sin(x) * I
assert csch(k * pi * I) is zoo
assert csch(17 * k * pi * I) is zoo
assert csch(k * pi * I / 2) == -1 / sin(k * pi / 2) * I
assert csch(n).is_real == True
def test_issue_11254b():
assert not integrate(csch(x), (x, 0, 1)).has(Integral)
def test_csch():
x, y = symbols('x,y')
k = Symbol('k', integer=True)
n = Symbol('n', positive=True)
assert csch(nan) == nan
assert csch(zoo) == nan
assert csch(oo) == 0
assert csch(-oo) == 0
assert csch(0) == zoo
assert csch(-1) == -csch(1)
assert csch(-x) == -csch(x)
assert csch(-pi) == -csch(pi)
assert csch(-2**1024 * E) == -csch(2**1024 * E)
assert csch(pi*I) == zoo
assert csch(-pi*I) == zoo
assert csch(2*pi*I) == zoo
assert csch(-2*pi*I) == zoo
assert csch(-3*10**73*pi*I) == zoo
assert csch(7*10**103*pi*I) == zoo
assert csch(pi*I/2) == -I
assert csch(-pi*I/2) == I
assert csch(5*pi*I/2) == -I
assert csch(7*pi*I/2) == I
assert csch(pi*I/3) == -2/sqrt(3)*I
assert csch(-2*pi*I/3) == 2/sqrt(3)*I
assert csch(pi*I/4) == -sqrt(2)*I
assert csch(-pi*I/4) == sqrt(2)*I
assert csch(7*pi*I/4) == sqrt(2)*I
assert csch(-3*pi*I/4) == sqrt(2)*I
assert csch(pi*I/6) == -2*I
assert csch(-pi*I/6) == 2*I
assert csch(7*pi*I/6) == 2*I
assert csch(-7*pi*I/6) == -2*I
assert csch(-5*pi*I/6) == 2*I
assert csch(pi*I/105) == -1/sin(pi/105)*I
assert csch(-pi*I/105) == 1/sin(pi/105)*I
assert csch(x*I) == -1/sin(x)*I
assert csch(k*pi*I) == zoo
assert csch(17*k*pi*I) == zoo
assert csch(k*pi*I/2) == -1/sin(k*pi/2)*I
assert csch(n).is_real is True