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Find dy/dx if x=rcostheta, y=rsintheta...

Find dy/dx if
`x=rcostheta, y=rsintheta`

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Given, `x=rcostheta, y=rsintheta`
`thereforedx/(d theta)=-rsintheta, dy/(d theta)=rcostheta`
`thereforedy/dx=(dy//d theta)/(dx//d theta)=-(rcostheta)/(rsintheta)=-x/y`
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MAHAVEER PUBLICATION-DIFFERENTIATION OR DERIVATIVE OF A FUNCTION-QUESTION BANK
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