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SIN(A)+SIN(B)=3 1/2 (COS(B)-COS(A)) THEN FIND SIN(3A)+SIN(3B)=??

SIN(A)+SIN(B)=31/2(COS(B)-COS(A)) THEN FIND
SIN(3A)+SIN(3B)=??
 

Grade:12th pass

1 Answers

PK NAIN
87 Points
7 years ago
apply sinc +sind formula and cosc-cosd then divide these two terms leaving only 31/2 on one side then cancel the terms and you get answer

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