(function(){var loadHandler=window['sl_{1604EA66-6E7F-47C5-B0C5-C90BC96600C2}'];loadHandler&&loadHandler(15, '<div id="spr0_4e072c8"><div id="spr1_4e072c8" class="kern slide"><img id="img2_4e072c8" src="data/img9.png" width="960px" height="540px" alt="" style="left:0px;top:0px;"/></div><div id="spr2_4e072c8" class="kern slide"><div id="svg0_4e072c8" style="left:0.8px;"><img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABAQMAAAAl21bKAAAAA1BMVEX///+nxBvIAAAAAXRSTlMAQObYZgAAAApJREFUeF5jYAAAAAIAAd6ej78AAAAASUVORK5CYII=" alt="OPL20U25GSXzBJYl68kk8uQGfFKzs7yb1M4KJWUiLk6ZEvGF+qCIPSnY57AbBFCvTW$2024 ID13 T9CTST nhan sp KNTT$ STT 108+K4lPs7H94VUqPe2XwIsfPRnrXQE//QTEXxb8/8N4CNc6FpgZahzpTjFhMzSA7T/nHJa11DE8Ng2TP3iAmRczFlmslSuUNOgUeb6yRvs0="/><svg width="960" height="42" viewBox="0 0 960 42"><path fill="#ffff00" d="M0,0 h960 v41.198 h-960 Z"/></svg></div><div id="spr3_4e072c8" style="left:0.8px;"><div style="width:0px;"><span id="txt0_4e072c8" data-width="460.947266" style="left:251.092px;top:5.091px;">BÀI TẬP CUỐI CHƯƠNG IV (Tiết 2)</span></div></div><div id="spr4_4e072c8" style="left:26.666px;top:46px;"><div style="width:0px;"><span id="txt1_4e072c8" data-width="334.250000" style="left:7.2px;top:5.304px;">Bài 3 (Bài 4.28 SGK/82).</span></div></div><div id="spr5_4e072c8" style="left:168px;top:93.993px;"><div style="width:0px;"><span id="txt2_4e072c8" data-width="68.444412" style="left:7.2px;top:5.587px;">Giải</span></div></div><div id="spr6_4e072c8" style="left:34px;top:310px;"><img id="img0_4e072c8" src="data/img77.png" width="852" height="195" alt="Gọi 𝐴 là gốc cây, 𝐵 là điểm cây gãy, 𝐶 là ngọn cây. \
Ta có 𝐴𝐵=𝐴𝐶. tan 20° ; 𝐵𝐶=  AC  cos 20°   (mỗi ý đúng 3 điểm)\
 Nên chiều cao của cây trước khi đổ gãy là\
𝐴𝐵+𝐵𝐶=5.  tan 20°+ 1  cos 20°    ≈7,1 (m) (Tính đúng 4 điểm)"/></div><div id="spr7_4e072c8" style="left:373.067px;top:52.924px;"><img id="img1_4e072c8" src="data/img78.png" width="531" height="265" alt="OPL20U25GSXzBJYl68kk8uQGfFKzs7yb1M4KJWUiLk6ZEvGF+qCIPSnY57AbBFCvTW$2024 ID13 T9CTST nhan sp KNTT$ STT 108+K4lPs7H94VUqPe2XwIsfPRnrXQE//QTEXxb8/8N4CNc6FpgZahzpTjFhMzSA7T/nHJa11DE8Ng2TP3iAmRczFlmslSuUNOgUeb6yRvs0=" style="left:-0.033px;top:0.038px;"/></div></div></div>');})();