A line makes the same angle \( \theta \) with each of the \( x \) a...

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A line makes the same angle \( \theta \) with each of the \( x \) and
\( \mathrm{P} \) z-axis. If the angle \( \beta \), which it makes with \( y \)-axis is

W such that \( \sin ^{2} \beta=3 \sin ^{2} \theta \), then \( \cos ^{2} \theta \) equals
(1) \( 2 / 3 \)
(2) \( 1 / 5 \)
(3) \( 3 / 5 \)
(4) \( 2 / 5 \)
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