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If alpha+beta+gamma=2pi, then (a) tan(...

If `alpha+beta+gamma=2pi,` 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(beta/2)tan(gamma/2)+tan(gamma/2)tan(alpha/2)=1` (c)`tan(alpha/2)+tan(beta/2)+tan(gamma/2)=-tan(alpha/2)tan(beta/2)tan(gamma/2)` (d)none of these

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CENGAGE ENGLISH-TRIGONOMETRIC FUNCTIONS-All Questions
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  2. If (y+3)/(2y+5)=sin^2x+2cosx+1, then the value of y lies in the interv...

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  3. If alpha+beta+gamma=2pi, then (a) tan(alpha/2)+tan(beta/2)+tan(gamma...

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  4. The total number of solution of |cotx|=cotx+1/(sinx),x in [0,3pi] , is...

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