Inverse Cosine in Python

Question

Apologies if this is straight forward, but I have not found any help in the python manual or google.

I am trying to find the inverse cosine for a value using python.

i.e. cos⁻¹(x)

Does anyone know how to do this?

Thanks

Answer 1

We have the acos function, which returns the angle in radians.

>>> import math >>> math.acos(0) 1.5707963267948966 >>> _ * 2 - math.pi 0.0