If unit vectors \( a \) and \( b \) are inclined at an angle \( 2 \theta \) such that \( |\mathb...
If unit vectors \( a \) and \( b \) are inclined at an angle \( 2 \theta \) such that \( |\mathbf{a}-\mathbf{b}|1 \) and \( 0 \leq \theta\pi \), then \( \theta \) lies in the interval
(a) \( [0, \pi / 6) \)
(b) \( (5 \pi / 6 \pi] \)
(c) \( [\pi / 6, \pi / 2) \)
(d) \( (\pi / 2,5 \pi / 6] \)
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