Q.Name the Python Library modules which need to be imported to invoke the following functions:

Modules required:

import math
import random
print(math.cos(0))          # 1.0 …

Concept — why functions live in modules

Python keeps its core language small. Specialised functions are grouped into standard-library modules, and a program must explicitly import a module before using anything inside it. This keeps the namespace clean and makes every dependency visible at the top of the file.

• cos() is a trigonometric function, so it lives with the other mathematical functions in the math module.
• randint() generates pseudo-random integers, so it lives with the other random-number tools in the random module.

Working code

import math
import random

print(math.cos(0))           # cosine of 0 radians
print(random.randint(1, 6))  # random integer N with 1 <= N <= 6 (both ends included)

Expected output (the second line is any integer from 1 to 6):

1.0
4

Both functions can also be imported directly:

from math import cos …