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(cos^(2)alpha x-cos5x)/(sin17x-sin3x)=-(...

(cos^(2)alpha x-cos5x)/(sin17x-sin3x)=-(sin2x)/(cos10x)

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

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

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

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

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

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

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

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