import numpy as np

## 1. np.sin()
print(np.sin(np.pi/2.))

#[Output]:
#1.0

"""In this we are taking an array of angles in degree and calculating the sine of that, so we are converting
them to radians first"""
print(np.sin(np.array((0., 30., 45., 60., 90.)) * np.pi / 180. ))

#[Output]:
#array([0.        , 0.5       , 0.70710678, 0.8660254 , 1.        ])


## 2. np.cos()
## Similarly we can calulate cosine and tan of angles(degrees or radians)
print(np.cos(np.array((0., 30., 45.)) * np.pi / 180. ))

#[Output]:
#array([1.        , 0.8660254 , 0.70710678])


## 3. deg2rad function for converting degree to radians
print(np.deg2rad(180))

#[Output]:
#3.141592653589793