If \( A, B, C, D \) are angles of a quadrilateral, then prove that \( \tan \left(\frac{A+B}{2}\r... VIDEO
If \( A, B, C, D \) are angles of a quadrilateral, then prove that \( \tan \left(\frac{A+B}{2}\right)+\tan \left(\frac{C+D}{2}\right)=0 \)https://bit.ly/YTAI_PWAP https://www.pw.live
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