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

If `alpha`,`beta`,`gamma` are the angles which a directed line makes with the positive directions of the co-ordinates axes,then `sin^(2)alpha+sin^(2)beta+sin^(2)gamma` is equal to

A

2

B

1

C

3

D

0

Text Solution

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The correct Answer is:
A
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