人教A版《数学5》(必修)“解三角形”这一章是高中数学的重要内容,当然也是高考的必考知识。这部分内容多和其他知识综合考查,或是赋予实际背景,但实际上只要能灵活运用正弦定理和余弦定理,就能轻松打开解三角形这把“锁”。1金钥匙1:知三求三析已知,认真审题易解之 People teach A version of “Mathematics 5” (compulsory) “solution triangle ” This chapter is an important part of high school mathematics, of course, the college entrance examination must be knowledge. This part of the content and more comprehensive examination of other knowledge, or to give the actual background, but in fact as long as the flexibility to use the sine and cosine theorem, you can easily open the triangle solution to this “lock.” 1 golden key 1: knowledge three seeking three known, seriously examining problems easily solved