def testTrig (self):
"Test sin, cos, tan, and their inverses"
assert eq (MA.arccos(-1.0), MA.pi)
assert eq (MA.sin(self.a), map(math.sin, self.a))
assert eq (MA.cos(self.a), map(math.cos, self.a))
assert eq (MA.tan(self.a), map(math.tan, self.a))
assert eq (MA.arccos(self.a), map(math.acos, self.a))
assert eq (MA.arcsin(self.a), map(math.asin, self.a))
assert eq (MA.arctan(self.a), map(math.atan, self.a))
assert MA.sin(self.m).shape == self.m.shape
assert MA.cos(self.m).shape == self.m.shape
assert MA.tan(self.m).shape == self.m.shape
assert MA.arcsin(self.m).shape == self.m.shape
assert MA.arccos(self.m).shape == self.m.shape
assert MA.arctan(self.m).shape == self.m.shape
assert eq (MA.sin(self.m).flat, map(math.sin, self.m.flat))
assert eq (MA.cos(self.m).flat, map(math.cos, self.m.flat))
assert eq (MA.tan(self.m).flat, map(math.tan, self.m.flat))
assert eq (MA.arcsin(self.m).flat, map(math.asin, self.m.flat))
assert eq (MA.arccos(self.m).flat, map(math.acos, self.m.flat))
assert eq (MA.arctan(self.m).flat, map(math.atan, self.m.flat))
