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The second order derivative of a sin^3 t...

The second order derivative of `a sin^3 t ` w.r.t, `a cos^3 t` at `t = pi/4` is

A

` (4sqrt2) /( 3a)`

B

` (2sqrt2) /( 3a)`

C

` ( 1)/(12a)`

D

`2`

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The correct Answer is:
A
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