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Please help I have tried doing this and I have basically forgotten all my trig knowledge Simplify the following expression so that it is expressed

Please help I have tried doing this and I have basically forgotten all my trig knowledge

Simplify the following expression so that it is expressed entirely in terms of sine and cosine : 2 3 set: (when (:13) . a b : (5111(3)) (COS($)) {3013(3) 0562 (or) That is, nd the values of a and b so that this equation holds

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