# Solving trigonometric equations using pythagorean identities

### Solving trigonometric equations using pythagorean identities

###### Basic concepts:

- Reference angle
- Find the exact value of trigonometric ratios
- ASTC rule in trigonometry (
**A**ll**S**tudents**T**ake**C**alculus) - Pythagorean identities

###### Related concepts:

- Unit circle
- Derivative of trigonometric functions