If a vector \( \overrightarrow{\mathrm{A}} \) makes angles \( \alph...

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If a vector \( \overrightarrow{\mathrm{A}} \) makes angles \( \alpha, \beta \) and \( \gamma \) respectively
P with the \( \mathrm{X}, \mathrm{Y} \) and \( \mathrm{Z} \) axes respectively then \( \sin ^{2} \alpha \)

W \( +\sin ^{2} \beta+\sin ^{2} \gamma= \)
(1) 0
(2) 1
(3) 2
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