A line makes an angle - with the X-Y-Z axes- Then sin2-sin2-sin2-

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A line makes ...

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A line makes an angle $α, β, γ$ with the $X, Y, Z$ axes. Then ${sin}^{2} α + {sin}^{2} β + {sin}^{2} γ =$

1

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\frac{3}{2}

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