Question: 6. If sin a = -= , and tan B = -, both a and B in Quadrant III, find the exact values of: A.

6. If sin a = -= , and tan B = -, both a and B in Quadrant III, find the exact values of: A. sin(a - B) B. cos(a + B) C. tan(a + B) D. sin(2a) E. cos(2B) 7. Use a double angle formula to rewrite the expression. - cos x sin x 8. Use a double angle formula to rewrite the expression. -4 cosz x + 2 9. Rewrite the expression in terms of the first power of cosine. sin$ 3x 10. Use the Half-angle Formulas to find the exact value of the trigonometric function: sin 67 30' 11. Use the Half-angle Formulas to find the exact value of the trigonometric function: cos 165 12. Find the exact values of sin 2u, cos Zu, and tan 2u using the double angle formulas. sinu = - 8 TT

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