Python acos


Python acos(x) method return the arccosine value of x[-1,1], in radians.

>>> import math
>>> math.acos(0.5)

1.0471975511965979


>>> math.acos(-1)

3.141592653589793


>>> math.acos(0)

1.5707963267948966



Arccosine y=arccos(x) Graph
Y
(Degrees)		 Y
(Radian)		 X
180 ̊ π -1
150 ̊ 5π/6 -0.866025
135 ̊ 3π/4 -0.707107
120 ̊ 2π/3 -0.5
90 ̊ π/2 0
60 ̊ π/3 0.5
45 ̊ π/4 0.707107
30 ̊ π/6 0.866025
0 ̊ 0 1