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If alpha+beta+gamma=2 pi, then...

If `alpha+beta+gamma=2 pi,` then

A

`tan (alpha)/(2)+tan (beta)/(2)+tan (gamma)/(2)=tan (alpha)/(2) tan (beta)/(2) tan (gamma)/(2)`

B

`tan (alpha)/(2)+tan (beta)/(2)+tan (gamma)/(2)=-tan (alpha)/(2) . tan (beta)/(2) . tan (gamma)/(2)`

C

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

D

`tan (alpha)/(2) . tan (beta)/(2)+tan (beta)/(2) . tan (gamma)/(2)+tan (gamma)/(2) . tan (alpha)/(2)=0`

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HIMALAYA PUBLICATION-MEASUREMENT OF ANGLES, TRIGONOMETRIC RATIOS AND RELATION BETWEEN SIDES AND ANGLES OF A TRIANGLE-QUESTION BANK
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