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यदि alpha+beta+r=2pi तो-...

यदि `alpha+beta+r=2pi` तो-

A

`tan""(alpha)/(2)+tan""(beta)/(2)+tan""(r)/(2)=tan""(alpha)/(2)=tan""(beta)/(2)tan""(r)/(2)`

B

`tan""(alpha)/(2)+tan""(beta)/(2)+tan""(r)/(2)=-tan""(alpha)/(2)tan""(beta)/(2)tan""(r)/(2)`

C

`tan""(alpha)/(2).tan""(beta)/(2)+tan""(beta)/(2)tan""(r)/(2)+tan""(r)/(2).tan""(alpha)/(2)=1`

D

`tanalpha.tanbeta+tanbeta.tanr+tanr.tanalpha=1`

लिखित उत्तर

Verified by Experts

The correct Answer is:
A
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