If x=a (cos theta + theta sin theta), y=...

If `x=a (cos theta + theta sin theta), y= a (sin theta- theta cos theta)` then `[(d^(2)y)/(dx^(2))]_(theta = (pi)/(4))`= …..

A

`(8 sqrt2)/(a pi)`

B

`-(8 sqrt2)/(a pi)`

C

`(a pi)/(8 sqrt2)`

D

`(4 sqrt2)/(a pi)`

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The correct Answer is:

A

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