If a straight line makes angles - with the x-y-z axes respectively- then show that sin2-sin2-sin2-2

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Angle between Two Lines

If a straight...

Question

If a straight line makes angles $α, β, γ$ with the $x, y, z$ axes respectively, then show that ${sin}^{2} α + {sin}^{2} β + {sin}^{2} γ = 2$

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