ভেক্টর রাশি-২

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\(\vec{A}=\hat{i}, \ \vec{B}=2\hat{i}+\hat{k}, \ \vec{A}\) ও \(\vec{B}\) ভেক্টরের মধ্যবর্তী কোণ -
[ দিঃ ২০১৬ ]

\(25.12^{o}\)
\(26.57^{o}\)
\(90.67^{o}\)
\(180.25^{o}\)
উপরের কোনোটিই নয়

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Ans: \(90.67^{o}\)
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