If \( \vec{x} \times \vec{b}=\vec{c} \times \vec{b} \) and \( \vec{...
If \( \vec{x} \times \vec{b}=\vec{c} \times \vec{b} \) and \( \vec{x} \perp \vec{a} \) then \( \vec{x} \) is equal to
\( \mathrm{P} \)
(a) \( \frac{\vec{b} \times(\vec{a} \times \vec{c})}{\vec{b} \cdot \vec{c}} \)
(b) \( \frac{(\vec{b} \times \vec{c}) \times \vec{a}}{\vec{b} \cdot \vec{a}} \)
(C) \( \frac{(\vec{a} \times(\vec{c} \times \vec{b})}{\vec{a} \cdot \vec{b}} \)
W.
(d) none of these
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