Copyright © by Holt, Rinehart and Winston. All Rights Reserved. Warm up 1. Solve the triangle 10.3 Extending the Trigonometric Ratios A 12 C 15 c B.

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Copyright © by Holt, Rinehart and Winston. All Rights Reserved. Warm up 1. Solve the triangle 10.3 Extending the Trigonometric Ratios A 12 C 15 c B

Copyright © by Holt, Rinehart and Winston. All Rights Reserved. Section 10-3 Reciprocal Trig Ratios

Copyright © by Holt, Rinehart and Winston. All Rights Reserved. 1. Sketch 150°

Copyright © by Holt, Rinehart and Winston. All Rights Reserved. 2. Sketch 210°

Copyright © by Holt, Rinehart and Winston. All Rights Reserved. Reciprocal Trig Function 10.3 Extending the Trigonometric Ratios

Copyright © by Holt, Rinehart and Winston. All Rights Reserved. 3. Find sec A B 3 C 7 11 A

Copyright © by Holt, Rinehart and Winston. All Rights Reserved Extending the Trigonometric Ratios Definitions Unit Circle Definition of Sine and Cosine: Let  be a rotational angle. Then sin  is the y-coordinate of the image of the point P(1, 0) rotated  ° about the origin, and cos  is the x-coordinate. θ

Copyright © by Holt, Rinehart and Winston. All Rights Reserved Extending the Trigonometric Ratios 4. Find the coordinates of point P on the unit circle. Point P has coordinates (cos 120 , sin 120  )  (–0.5, ).

Copyright © by Holt, Rinehart and Winston. All Rights Reserved. Assignment Enrichment 8-5 and page 652 # # are graphs and # 29 – 32 are find sine and cosine