1. Trigonometric Functions in the Coordinate Plane 12 April 2011

2. Switch Back to Radian Mode!!! To specify radian measure (rather than degree measure) you may see the variable t instead of theta.

3. The Distance Formula

4. Trigonometric Ratios in the Coordinate Plane r } x } y

5. Trigonometric Ratios in the Coordinate Plane, cont.

6. Solving for Trigonometric Ratios in the Coordinate Plane (–4, 10) and r = 5

7. Your Turn The following three points have a radius of 2 (r = 2). Solve for all six trigonometric ratios for each point. 1. (2, 6)2. (4, –8)3. (–6, –10)

8. Solving for Trigonometric Ratios in the Coordinate Plane If you’re not given the length of the radius, then you need to solve for it 1 st !!! Example: (–2, 4)

9. Solving for Trigonometric Ratios in the Coordinate Plane

10. Your Turn Pg. 452: 1 – 6