我想请教(11)题中的sin(α+β)等于多少怎么得的谢谢这题我知道cosα=1/3;sinα=2√2/3;cos(α+β)=-3/5;cosβ=cos[(α+β)-α]=cos(α+β)cosα+sin(α+β)sinα我现在想请教sin(α+β)=多少怎么得的西谢谢
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/28 20:29:11
![我想请教(11)题中的sin(α+β)等于多少怎么得的谢谢这题我知道cosα=1/3;sinα=2√2/3;cos(α+β)=-3/5;cosβ=cos[(α+β)-α]=cos(α+β)cosα+sin(α+β)sinα我现在想请教sin(α+β)=多少怎么得的西谢谢](/uploads/image/z/2561350-22-0.jpg?t=%E6%88%91%E6%83%B3%E8%AF%B7%E6%95%99%EF%BC%8811%EF%BC%89%E9%A2%98%E4%B8%AD%E7%9A%84sin%28%CE%B1%2B%CE%B2%29%E7%AD%89%E4%BA%8E%E5%A4%9A%E5%B0%91%E6%80%8E%E4%B9%88%E5%BE%97%E7%9A%84%E8%B0%A2%E8%B0%A2%E8%BF%99%E9%A2%98%E6%88%91%E7%9F%A5%E9%81%93cos%CE%B1%3D1%2F3%3Bsin%CE%B1%3D2%E2%88%9A2%2F3%3Bcos%28%CE%B1%2B%CE%B2%29%3D-3%2F5%3Bcos%CE%B2%3Dcos%5B%28%CE%B1%2B%CE%B2%29-%CE%B1%5D%3Dcos%28%CE%B1%2B%CE%B2%29cos%CE%B1%2Bsin%28%CE%B1%2B%CE%B2%29sin%CE%B1%E6%88%91%E7%8E%B0%E5%9C%A8%E6%83%B3%E8%AF%B7%E6%95%99sin%EF%BC%88%CE%B1%2B%CE%B2%EF%BC%89%3D%E5%A4%9A%E5%B0%91%E6%80%8E%E4%B9%88%E5%BE%97%E7%9A%84%E8%A5%BF%E8%B0%A2%E8%B0%A2)
x_kPJ)[{$3ً2&]ɖd>۪ k@o!M>+xMė"Kw~pbi|Nv/N".N~~z[q&LgQ+yNzZk5JζeŨɟ]Deo㧯}r[d~3+<