Unit 3 Test - All-in-One High School

cos4x — sin4 x cos2x — sm2 x (cos x) cos2x — sm2 x cos2x4sin x 4. Change secant and cosecant into terms of sine and cosine, then find a common denominator. ... 10. Because this IS cos3x, you will need to divide by 3 at the very end to get the final answer. This is why we 8sin X ... (cos5x+ cos9x) — cos(x y) cosy— sin(x y) siny sm 5x ... ................
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