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10.) cos2x-sin2x=2cos2x-1 -(1-cos2x) :-ûæs2x- I coszx— I ± cosux= acas¿x- I / CLASS PRACTICE AND EXAMPLES: r GO. you GOI 9.) cos2x-sin2x=1-2sin2x (l - smzx) costx- COS y/ -SID - HOMEWORK: Simplify 1-10, verify 11-15 FACTOR C#'s 1-5): SIMPLIFY 6-10): 30sin xcosx 6 cos xsinx ................
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