已知tanα=12,tan(α-β)=-25,那么tan(2α-β)的值为( ) 发布时间:2017-04-23 12:49 │ 来源:www.tikuol.com 题型:选择题 问题: 已知tanα=12,tan(α-β)=-25,那么tan(2α-β)的值为( )A.-34B.98C.-98D.112
题型:选择题 从B栏中找出A栏的答语,并将其字母代号填入问句前的括号里。 A ( ) 1. What colour is it? ( ) 2. How many books do you have? ( ) 3. May I have a look? ( ) 4. Who's he? ( ) 5. Is he strong? B A. He is my friend. B. Yes, he is. C. It's red. D. Sure. Here you are. E. Seven. 查看答案