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" 17."(cos x)/((1-sin x)(2-sin x))...

" 17."(cos x)/((1-sin x)(2-sin x))

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1- (sin ^ (2) x) / (1 + cos x) + (1 + cos x) / (sin x) - (sin x) / (1-cos x) =

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

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Let f(x)=((2sin x+sin2x)/(2cos x+sin2x)*(1-cos x)/(1-sin x));x in R Consider the following statements.

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

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

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

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