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\underset{A}{\to} = \hat{i} + 2 \hat{j} - 3 \hat{k}, \underset{B}{\to} = 3 \hat{i} - \hat{j} + 2 \hat{k}

2 \underset{A}{\to} + \underset{B}{\to} এ ব ং \underset{A}{\to} + 2 \underset{B}{\to}

এর অন্তঃস্থ কোণ কত?

\cos^{- 1} \frac{31}{50}

\cos^{- 1} \frac{31}{30}

\sin^{- 1} \frac{31}{50}

\sin^{- 1} \frac{31}{30}

ANS : 1

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