Question

verify that the equation is an identity:
1+ sin 2x= (sinx + cosx) ^2

Answer 1

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Answer 2

Expand the rigth hand side into
\(\sin^2x+2\sin x\cos x+\cos^2 x\)
\((\sin^2 x+\cos^2 x) +2\sin x\cos x\)
\(1+\sin(2x)\)

Answer 3

thank you