1.

If siny = xcos(a+y), then dx/dy is :(a) \(\frac{cos\,a}{cos^2(a+y)}\)(b) \(\frac{-cos\,a}{cos^2(a+y)}\)(c) \(\frac{cos\,a}{sin^2y}\)(d) \(\frac{-cos\,a}{sin^2y}\)

Answer»

Option :  (a) \(\frac{cos\,a}{cos^2(a+y)}\)



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