# Python Math Module

The `math` module provides access to the mathematical functions defined by the C standard. These functions cannot be used with complex numbers; use the `cmath` module for complex support.

## Importing the Module

```python
import math
```

## Constants

```python
print(math.pi)  # 3.141592...
print(math.e)   # 2.718281...
print(math.inf) # Infinity
print(math.nan) # Not a Number
```

## Numeric Functions

### Rounding

```python
x = 4.7

print(math.ceil(x))  # 5 (Round up)
print(math.floor(x)) # 4 (Round down)
print(math.trunc(x)) # 4 (Truncate decimal)
```

### Absolute and Factorial

```python
print(math.fabs(-5.5))    # 5.5 (Absolute value as float)
print(math.factorial(5))  # 120 (5 * 4 * 3 * 2 * 1)
```

## Power and Logarithmic Functions

```python
# Power and Root
print(math.pow(2, 3))  # 8.0 (2 to the power of 3)
print(math.sqrt(16))   # 4.0 (Square root)

# Logarithms
print(math.log(10))       # Natural log (base e)
print(math.log(100, 10))  # Log base 10 (Output: 2.0)
print(math.log10(100))    # Log base 10 convenience function
```

## Trigonometry

Trigonometric functions expect angles in **radians**.

```python
angle = math.radians(90) # Convert degrees to radians

print(math.sin(angle))
print(math.cos(angle))
print(math.tan(angle))

print(math.degrees(math.pi)) # Convert radians to degrees (180.0)
```

[[programming/python/python]]