# F.P Math > Trigonometrical Ratios, Graphs, Equations and Indentities

*Click on the top-left icon to open the playlist.*

**Playlist:**

- Trig. ratios for 30, 60 and 90 degrees
- Trig. ratios for 45, 45 and 90 degrees
- Trig. ratios for positive multiples of 30, 45 and 60 degrees
- Trig. ratios for negative multiples of 30, 45 and 60 degrees
- Trigonometric graphs
- The quadrant rule (or CAST diagram)
- Using the Quadrant Rule to solve trig. equations
- Using the Quadrant Rule to solve various different ranges
- Using the Quadrant Rule to solve equations with multiple angles
- Two basic trigonometric identities: tanθ ≡sinθ/cosθ and sin²θ+cos²θ ≡1