If \( A, B, C, D \) are angles of a quadrilateral, then prove that \( \operatorname{cosec}^{2}(\... VIDEO
If \( A, B, C, D \) are angles of a quadrilateral, then prove that \( \operatorname{cosec}^{2}(\mathrm{~A}+\mathrm{B})=\operatorname{cosec}^{2}(\mathrm{C}+\mathrm{D}) \)https://bit.ly/YTAI_PWAP https://www.pw.live
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