Inverse Cosine in Python
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
We have the acos
function, which returns the angle in radians.
>>> import math
>>> math.acos(0)
1.5707963267948966
>>> _ * 2 - math.pi
0.0
To augment the correct answers to use math.acos
, it is also worth knowing that there are math functions suitable for complex numbers in cmath
:
>>> import cmath
>>> cmath.acos(1j)
(1.5707963267948966-0.88137358701954294j)
Stick with math.acos
if you're only interested in real numbers,