If \sin \\alpha+\sin \\beta+\sin \\gamma=0 and \cos \\alpha+\cos \\beta+\cos \\gamma=0, then the value of \cos (\\alpha-\\beta)+\cos (\\beta-\\gamma)+\cos (\\gamma-\\alpha) is:

UPSC NDA Math Model Paper 1

Question : 94 of 120

Marks: +1, -0

If sin‌α+sin‌β+sin‌γ=0 and cos‌α+cos‌β+cos‌γ=0, then the value of cos(α−β)+cos(β−γ)+cos(γ−α) is:

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