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If siny=xsin(a+y), prove that (dy)/(dx)...

If `siny=xsin(a+y),` prove that `(dy)/(dx)=(sin^2(a+y))/(sina)`

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`(dy)/(dx)=(sina)/(sin^2(a+y))therefore(dy)/(dx)=1/(((dx)/(dy)))=(sin^2(a+y))/(sina)`
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