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\(|\vec{A}\times{\vec{B}}|^2=\) নিচের কোনটি?
[ রাঃ ২০১৭ ]

\(A^2B^2-(\vec{A}.\vec{B})^2\)
\(A^2B^2-2\vec{A}.\vec{B}\)
\(A^2B^2-2AB\sin{\theta}\)
\(A^2B^2-2AB\cos{\theta}\)
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Ans: \(A^2B^2-(\vec{A}.\vec{B})^2\)
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