cos8x-cos5x=-2sin(13x)/(2)sin(3x)/(2)

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

cos2x(cos x)/(2)-cos3x(cos(9x))/(2)=sin5x(sin(5x))/(2)

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

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

Prove that: ,(cos9x-cos5x)/(sin17x-sin3x)=-(sin2x)/(cos10x)

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

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

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Prove that (cos9x —cos5x)/(sin17x-sin3x)=(-sin2x)/(cos10x) .