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Prove that: (cos9x-cos5x)/(sin17 x-sin3x...

Prove that: `(cos9x-cos5x)/(sin17 x-sin3x)=-(sin2x)/(cos10 x)`

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(cos9x-cos5x)/(sin17x-sin3x)=-(sin2x)/(cos10x)

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Prove that: (cos9x-cos5x)/(sin 17 x-sin3x)=\ -(sin2x)/(cos 10 x)

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Prove that : (cos 9x - cos 5x)/(sin 17x -sin 3x)=- (sin 2x)/(cos 10x) .

Prove that (cos(9x)-cos(5x))/(sin(17x)-sin(3x))=-(sin(2x))/(cos(10x))

Prove the following: (cos9x -cos5x)/(sin17x-sin3x)=-(sin2x)/(cos10x)