How to calculate sin and cos of the number?

Answer 1

https://docs.python.org/3/library/math.html

Answer 2

import math

x = math.pi / 2
print(math.sin(x))
print(math.cos(x))

Note: The arguments of these functions should be in radians.

Read more here:
https://docs.python.org/3/library/math.html