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If x = a sec theta , y =b tan theta , th...

If `x = a sec theta , y =b tan theta ,` then `(d^2y)/(dx^2)` at `theta = pi/6` is :

A

`(-3sqrt(3b))/(a^2)`

B

`(-2sqrt(3b))/(a)`

C

`(-3sqrt(3b))/(a)`

D

`(-b)/(-3sqrt(3b))`

Text Solution

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The correct Answer is:
C
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