Find solutions:

sin ( - 7x) = cos(2-5x) + sin8

Interval - [ ;1]

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What I did: 1) sin ( - 7x) = sin cos7x + sin(7x)cos( )

2) cos(2-5x) = cos2cos5x + sin2sin5x

..and 3) sin8 = sin2

But what should I do now, should I multiply by ? Thank you.