Trigonometric Values (0°, 30°, 45°, 60°, 90°)
Trigonometric Values (0°, 30°, 45°, 60°, 90°)
| Angle (θ) | 0° | 30° | 45° | 60° | 90° |
|---|---|---|---|---|---|
| sin θ | 0 | 1/2 | 1/√2 | √3/2 | 1 |
| cos θ | 1 | √3/2 | 1/√2 | 1/2 | 0 |
| tan θ | 0 | 1/√3 | 1 | √3 | Not Defined (∞) |
Easy Memory Trick
SIN (Increasing): 0 → 1 → 2 → 3 → 4 (√0/2, √1/2, √2/2, √3/2, √4/2 )
COS (Decreasing): 4 → 3 → 2 → 1 → 0 (√4/2, √3/2, √2/2, √1/2, √0/2)
TAN
TAN = SIN ÷ COS
| Angle | 0° | 30° | 45° | 60° | 90° |
|---|---|---|---|---|---|
| tan θ | 0 | 1/√3 | 1 | √3 | Not Defined (∞) |
Formula to Remember
- SIN: 0 → 1 → 2 → 3 → 4 → √ → ÷2
- COS: 4 → 3 → 2 → 1 → 0 → √ → ÷2
- TAN = SIN ÷ COS
Memory Sentence: "SIN goes Up, COS comes Down, TAN divides them Around."