def check_cosh():
x = create_input_for_trigonometric_ops(
[0, 1, np.pi / 2, 3 * np.pi / 4, np.pi])
y = nd.cosh(x)
# expected ouput for indices=(0, 1, -3, -2, -1) after applying cosh()
expected_output = [
1,
np.cosh(1),
np.cosh(np.pi / 2),
np.cosh(3 * np.pi / 4),
np.cosh(np.pi)
]
assert_correctness_of_trigonometric_ops(y, expected_output)
def cosh(x):
return nd.cosh(x)
def grad_op(x):
return 1 / nd.cosh(x)**2
