Function cos 

pub fn cos(x: number) -> number

Returns the cosine of a number given in radians.

Parameters

• x: an angle in radians.

Return value

The cosine of x, as a float in the range [−1, 1].

Examples

print(math.cos(0))          --> 1.0
print(math.cos(math.pi))    --> -1.0

See also

sin, tan, acos, rad