Pythagorean Identity
Description
Fundamental trigonometric identity relating sine and cosine.
Variables
| Symbol | Meaning |
|---|---|
θ | Angle |
sin²θ | Sine squared |
cos²θ | Cosine squared |
Example
Problem
Verify for θ=30°
Solution
(0.5)² + (0.866)² ≈ 1
Real-World Applications
- Trigonometric simplification
- Calculus
- Physics