纵观近两年的江苏高考,第15题三角题无疑是比较简单的,是考生必须要拿分的,对比2015年高考与2016年高考,三角题的难度总体处于平稳状态,但略有提升的趋势。2015年高考第15题,题干:在△ABC中,AB=2,AC=3,∠A=60°。(1)求BC的长;(2)求sin2C的值。第(1)问考查的是用余弦定理求第三边的长,绝大多数考生都能轻松解决。但在第(2)问中 Throughout the past two years, Jiangsu entrance exam, Question 15 problem is undoubtedly a simple triangle, candidates must take points, compared to the 2015 college entrance examination and the 2016 college entrance examination, the difficulty of the triangular problem overall in a steady state, but slightly improved the trend of. 2015 college entrance examination 15 questions, the title stem: In ABC, AB = 2, AC = 3, ∠ A = 60 °. (1) find the length of BC; (2) find the value of sin2C. Section (1) asks to examine the length of the third side with the cosine theorem, the vast majority of candidates can easily be solved. But in (2) asks