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Question

2 i^{\land} - 3 j^{\land} + 6 k^{\land}

ভেক্টরটি Y অক্ষের সাথে যে কোণ উৎপন্ন করে তা কত?

\cos^{- 1} (\frac{3}{49})

\cos^{- 1} (- \frac{3}{49})

\cos^{- 1} (- \frac{3}{7})

\cos^{- 1} (\frac{2}{7})

ANS : 3

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