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"If "y=sqrt((2(tanalpha+cotalpha))/(1+ta...

`"If "y=sqrt((2(tanalpha+cotalpha))/(1+tan^(2)alpha)+(1)/(sin^(2)alpha))"when "alpha in ((3pi)/(4),pi)"then find "(dy)/(dalpha)" at" alpha=(5pi)/(6)`

A

4

B

2

C

3

D

-4

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The correct Answer is:
A
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