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If x = a{costheta + log tan((theta)/(2))...

If `x = a{costheta + log tan((theta)/(2))} andy = a sin theta,` then `(dy)/(dx)` is equal to

A

`cot theta` 0

B

`tan theta`

C

`sin theta `

D

`cos theta `s

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The correct Answer is:
B
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