# import math

**[import math](https://docs.python.org/3/library/math.html)** is a Python import that provides mathematical functions and constants. Use it for trigonometry, logarithms, rounding, and accessing π and e.

## Example

```python
# Python
# description: math functions and constants

import math

# Constants
print(math.pi)     # 3.14159...
print(math.e)      # 2.71828...

# Trigonometry
angle = math.radians(45)
print(math.sin(angle))  # 0.707...
print(math.cos(angle))  # 0.707...

# Logarithms and exponentials
print(math.log(100))      # natural log
print(math.log10(100))    # base 10 log
print(math.exp(1))        # e^1

# Powers and roots
print(math.sqrt(16))      # 4.0
print(math.pow(2, 8))     # 256.0

# Rounding
print(math.floor(3.7))    # 3
print(math.ceil(3.2))     # 4

# Hyperbolic functions
print(math.sinh(1))

# Factorial and GCD
print(math.factorial(5))  # 120
print(math.gcd(48, 18))   # 6
```

## Common functions

- `math.sqrt(x)`: square root
- `math.pow(x, y)`: x to the power y
- `math.exp(x)`: e to the power x
- `math.log(x)`: natural logarithm
- `math.log10(x)`: base-10 logarithm
- `math.sin(x)`, `math.cos(x)`, `math.tan(x)`: trigonometry
- `math.radians(x)`, `math.degrees(x)`: angle conversion
- `math.floor(x)`, `math.ceil(x)`: rounding
- `math.factorial(x)`: x!
- `math.gcd(a, b)`: greatest common divisor