Point \( (\alpha, \beta, \gamma) \) lies on the plane \( x+y+z=2 \). Let \( \vec{a}=\alpha \hat{...
Point \( (\alpha, \beta, \gamma) \) lies on the plane \( x+y+z=2 \). Let \( \vec{a}=\alpha \hat{i}+\beta \hat{j}+\gamma \hat{k}, \hat{k} \times(\hat{k} \times \hat{a})=\overrightarrow{0} \), then \( \gamma= \)
(a) 1
(b) 2
(c) 3
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