Prove that cos 2- -cos 2- -cos 2- -1-0

[ cos ^ 2 #160; xα +cos ^ 2 #160; β +cos ^ 2 #160; γ +1=0; ...

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General Solution of Trigonometric Equation

Prove that c...

Question

Prove that
$cos 2 α + cos 2 β + cos 2 α + 1 = 0$

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cos α + cos β + cos α = 0 = sin α + sin β + sin α

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α, β, γ

cos 2 α + cos 2 β + cos 2 γ + 1 = 0

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cos 2 α + cos 2 β + cos 2 γ = - 1

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