ভেক্টর রাশি-৪

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\(2\hat{i}+3\hat{j}\) ভেক্টরটি \(X\) অক্ষের সহিত কত কোণে আনত?
\(\tan^{-1}{\frac{3}{2}}\)
\(\cos^{-1}{\frac{2}{\sqrt{13}}}\)
\(\sin^{-1}{\frac{2}{3}}\)
\(\cos^{-1}{\frac{2}{3}}\)
উপরের কোনোটিই নয়

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Ans: \(\cos^{-1}{\frac{2}{\sqrt{13}}}\)
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