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If sqrtr=ae^(thetacotalpha), where a and...

If `sqrtr=ae^(thetacotalpha)`, where a and `alpha` are real numbers, then `(d^2r)/(d theta^2)-4r cot^2alpha` is

A

r

B

`1/r`

C

1

D

0

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The correct Answer is:
D
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