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If x=a cos ^(3) theta and y = a sin^(3) ...

If `x=a cos ^(3) theta` and y = a `sin^(3) theta ` then `(dy)/( dx) = `

A

`(3sqrt(y))/( x)`

B

`-3sqrt((x)/(y))`

C

`3sqrt((x)/(y))`

D

`3sqrt((y)/(x))`

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The correct Answer is:
D
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