Anonymous Anonymous

29-07-2014
Mathematics

Answered

prove that \(cos 9x-cos 5x/sin17x-sin3x=-sin2x/cos10x\)

Verified Answer :

29-07-2014

cos9x - cos5x = -2sin2x.sin7x
sin17x - sin3x = 2sin7x.cos10x
so f(x) = \(\frac{-2sin2x.sin7x}{2sin7x.cos10x}\) =\(\frac{-sin2x}{cos10x}\)

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