Trig. equations with graphs

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Presentation transcript:

Trig. equations with graphs Trigonometry

1. 2. 3. 4. In each example find the x coordinate of the points where the line and the trig. curve intersects. Give your answers to the nearest degree in each case. 1. 1 -1 270° 90° x sinx y = 0.75 1 -1 270° 90° x sinx y = 0.3 2. 3. 1 -1 270° 90° x sinx y = -0.82 4. 1 -1 270° 90° x sinx y = -0.5

y = 0·75 sin-1 0·75 = 49° 49° 49°

sin-1 0·82 55° 55° = 55° y = -0·82

5. 6. 7. 8. In each example find the x coordinate of the points where the line and the trig. curve intersects. Give your answers to the nearest degree in each case. 1 -1 270° 90° x sinx y = 0.225 5. 1 -1 270° 90° x sinx y = -0.415 6. -1 cosx x 1 180° 360° y = 0.832 7. -1 cosx x 1 180° 360° y = 0.65 8.

9. 10. 11. 12. In each example find the x coordinate of the points where the line and the trig. curve intersects. Give your answers to the nearest degree in each case. 9. -1 cosx x 1 180° 360° y = -0.67 10. -1 cosx x 1 180° 360° y = -0.34 cosx -1 x 1 180° 360° y = 0.18 11. -1 x 1 180° 360° y = -0.823 cosx 12.

13. 14. 15. 16. In each example find the x coordinate of the points where the line and the trig. curve intersects. Give your answers to the nearest degree in each case. 1 -1 270° 90° x sinx y = -0.715 13. -1 x 1 180° 360° y = 0.582 cosx 14. 1 -1 270° 90° x sinx y = 0.818 -1 cosx x 1 180° 360° y = 0.283 15. 16.