Question

solve sin3x-sinx=sin5x

Answer 1

Answer:

Hey there

sin 3x - sin x = sin 5x

sin 3x = sin 5x + sin x

sin 3x = 2 sin 3x cos 2x

1 = 2 cos 2x

cos 2x = 1/2

cos 2x = cos π/3

Now it is in form cos x = cos y,

x = 2nπ ± y

then,

x = 2nπ ± π/3

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