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If alpha+beta+gamma=pi and tan((beta+gam...

If `alpha+beta+gamma=pi` and `tan((beta+gamma-alpha)/4)tan((gamma+alpha-beta)/4)tan((alpha+beta-gamma)/4)=1`. Prove that `1+cosalpha+cosbeta+cosgamma=0`

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ARIHANT MATHS-TRIGONOMETRIC FUNCTIONS AND IDENTITIES-Exercise (Subjective Type Questions)
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