In a quadrilateral \( A B C D \) it is given that \( A B \| C D \) and the diagonals \( A C \) a... VIDEO
In a quadrilateral \( A B C D \) it is given that \( A B \| C D \) and the diagonals \( A C \) and \( B D \) are perpendicular to each other, Show that \( A D \cdot B C \geq A B \cdot C D \).https://bit.ly/YTAI_PWAP https://www.pw.live
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\[
(\vec{a} \times \vec{b}) \times(\vec{c} \times \vec{d})+(\vec{a} \times \vec{c}) ...
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