If a line makes the angle \( \alpha, \beta, \gamma \) with three
P ...
If a line makes the angle \( \alpha, \beta, \gamma \) with three
P dimensional co-ordinate axes respectively, then
W \( \cos 2 \alpha+\cos 2 \beta+\cos 2 \gamma= \)
(1) -2
(2) -1
(3) 1
(4) 2
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