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

If `x = a cos^(3) theta , y = a sin^(3) theta , ` then `1+((dy)/(dx))^(2)` is _______

A

`tantheta`

B

`tan^(2)theta`

C

`sec^(2)theta`

D

1

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The correct Answer is:
C
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