论文部分内容阅读
理科（20）文科（21）题别解陕西武功杨明皓江西九江李明林山东宁阳程若礼浙江泰顺曾安雄黑龙江鸡西孙丕训武汉市蒋维新解法1如图，延长AB到D使BD=在△ACD中，由正弦定理得由余弦、正弦定理得整理，得解得解法3·：a＋c-Zb，田正弦定理得理科（21）文科（22）题别林武汉市李春
Science (20) Liberal Arts (21) Title Solution Shaanxi Wugong Yang Mingjian Jiangxi Jiujiang Li Minglin Shandong Ningyang Cheng Ruoli Zhejiang Taishun Zeng Anxiong Heilongjiang Jixi Sun Xiong Wuhan Jiang Weixin Solution 1 Picture, Extend AB to D to make BD = In ΔACD, The sine theorem was obtained by the cosine and sine theorem. The solution was 3::a+c-Zb. The field sine theorem was Science. (21) The liberal arts (22).