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Qn #1723
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$ \vec{a} = x\hat{i} - 3\hat{j} - \hat{k},\quad \vec{b} = 2x\hat{i} + x\hat{j} - \hat{k} $ Angle between $ \vec{a} $ and $ \vec{b} $ is acute and angle between $ \vec{b} $ and $ +y $ axis lies in $ \left(\dfrac{\pi}{2}, \pi\right) $ Find $x$.
A.
${1,2}$
B.
${-2,-3}$
C.
${x : x < 0}$
D.
${x : x > 0}$
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❓ Question: $ \vec{a} = x\hat{i} - 3\hat{j} - \hat{k},\quad \v... | TANCET Group Studies | Tancet Group Studies