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If alpha, beta, gamma are the angles mad...

If `alpha, beta, gamma` are the angles made by a line with the positive directions of the coordinate axes, then `sin^(2)alpha+sin^(2)beta+sin^(2)gamma=`

A

`[-1//2, 1]`

B

`[-1//2, oo)`

C

`[-1, 2]`

D

`[1, oo)`

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