If a line makes angle - - - - - with the co-ordinates axes- Prove that sin 2- - sin 2- - cos 2- - 1

l=cos #160; α #160; m=cos #160; β #160; n=cos #160; γ #160; #160; Now l^ 2 + m^ 2 + n^ 2 =1 cos ^ 2 #160; α +co ...

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Direction Cosines

If a line mak...

Question

If a line makes angle $(α, β, γ)$ with the co-ordinates axes. Prove that ${sin}^{2} α + {sin}^{2} β - {cos}^{2} γ = 1$

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