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| \underset{A}{\to} . \underset{B}{\to} | = | \underset{A}{\to} \times \underset{B}{\to} |

\underset{A}{\to} ও \underset{B}{\to}

এর মধ্যকার কোণ (angle) কত?

π

\frac{π}{4}

\frac{π}{6}

2 π

ANS : 2

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