Question: Solve all problems Otherwise don't solve Report for fake answer 7. Prove that (i) sin(A+B)sin(AB)=sin2Asin2B. (ii) cos(A+B)cos(AB)=cos2Asin2B =cos2Bsin2A (iii) sin2(A+B)sin2(AB)=sin2Asin2B (iv) cos8cos2=cos25sin23

Solve all problems Otherwise don't solve Report for fake answer 7.

Solve all problems Otherwise don't solve Report for fake answer

7. Prove that (i) sin(A+B)sin(AB)=sin2Asin2B. (ii) cos(A+B)cos(AB)=cos2Asin2B =cos2Bsin2A (iii) sin2(A+B)sin2(AB)=sin2Asin2B (iv) cos8cos2=cos25sin23

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