Math, asked by naagulikha6472, 9 months ago

Prove- (sin3x + sin x) sin x + ( cos 3x - cos x) cos x = 0

Answers

Answered by wwwvijaya811

2

Answer:

let try

Step-by-step explanation:

sin3x sinx+sin^2x+cos3x cosx-cos^2x

cos3xcosx+sin3xsinx-(cos^2x-sin^2x)

cos(3x-x)-cos2x

cos2x-cos2x=0

hence proved

hope it helps you

Answered by priyatharsiniay

2

Answer:

LHS=RHS this is the answers for these problem

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