MCQ
સદિશો $ \vec{a} = \hat{i} + \hat{j} - \hat{k} $ અને $ \vec{b} = \hat{i} - \hat{j} + \hat{k} $ વચ્ચેનો ખૂણો $ \theta = $ _______
- ✓$ cos^{-1} \frac{1}{3} $
- B$ -cos^{-1} \frac{1}{3} $
- C$ -sin^{-1} \frac{2\sqrt{2}}{3} $
- D$ sin^{-1} \frac{1}{3} $
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