TF 1-3

TF 1-3

1. SohCahToa

2. tan θ = O/A

3. CAST Starts in 4th quadrant and goes Counter-clockwise

4. Standard position starts at origin and travels along positive X axis

   • It is also the initial arm, though the initial arm is not necessarily in standard position, The other arm is called the Terminal arm

5. Reference angles are found by determining the angle between the terminal arm and the closest X axis

6. 45 45 90 triangle = 1 1 √2 side lengths 30 60 90 triangle = 1 √3 2 side lengths

7. A^2+B^2=C^2 only Applies to right angle triangles

8. A triangle always adds to 180

9. Sine law a/sin A = b/sin B = c/sin C

   • a>h =1 triangle h>a = 0 triangles h<a<b = 2 triangles a>b= 1 triangle

10. Cosine law a^2=b^2+c^2-2bc cos a

11. Remember Bedmas