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If r=1-costheta," then "r(d theta)/(dr)=...

If `r=1-costheta," then "r(d theta)/(dr)=`

A

`sec((theta)/(2))`

B

`-csc((theta)/(2))`

C

`tan((theta)/(2))`

D

`-cot((theta)/(2))`

Text Solution

Verified by Experts

The correct Answer is:
C
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