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If x=acos^3theta and y=asin^3theta, then...

If `x=acos^3theta` and `y=asin^3theta,` then find the value of `(d^2y)/(dx^2)` at `theta=pi/6dot`

A

` (sec^(2)theta)/( 3asin theta ) `

B

` (-sec ^(2)theta)/( 3asin theta)`

C

` (sec^(4) theta)/( 3asin theta)`

D

` (-sec ^(4)theta)/( 3asin theta)`

Text Solution

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The correct Answer is:
C
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