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If sinx=(2t)/(1+t^2) , tany=(2t)/(1-t^2)...

If `sinx=(2t)/(1+t^2)` , `tany=(2t)/(1-t^2)` , find `(dy)/(dx)` .

A

1

B

0

C

-1

D

2

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The correct Answer is:
A
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