sinx+cosy=1/3 cosx+siny=1/6 则 sin(x+y)?
人气：148 ℃ 时间：2020-03-28 06:54:33
解答
把给出的两个式子平方,求出cosxsiny和sinxcosy,再把求出的结果相加
推荐
- cosx-cosy=1/2,sinx-siny=1/3,sin(x+y)=
- sinx+cosy=1/3 cosx+siny=1/6 则sin(x+y)=?
- sinx+siny=-1/3 cosx+cosy=1/2,求sin(x+y)的值.
- 已知sinx+siny=1/3,cosx-cosy=1/5,求cos(x+y),sin(x-y).
- sinx-siny=1/3,cosx-cosy=2/3,sin(x+y)=?
- what are you going to do tomorrow night?(根据实际回答问题）
- I will come to your party.同义句
- 明月松间照,清泉石上流 选自哪,作者是谁
猜你喜欢
