已知向量a=(sinα,cosα),b=(cosx,sinx),c=(sinx+2sinα,cosx+2cosα)1.若α=π/4,求函数f(x)=b·c的最小值及相应的x值2.若a与b的夹角为π/3,且a⊥c,求tan2α的值很抱歉。a=(cosα,sinα)
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/09 07:44:15
![已知向量a=(sinα,cosα),b=(cosx,sinx),c=(sinx+2sinα,cosx+2cosα)1.若α=π/4,求函数f(x)=b·c的最小值及相应的x值2.若a与b的夹角为π/3,且a⊥c,求tan2α的值很抱歉。a=(cosα,sinα)](/uploads/image/z/615337-25-7.jpg?t=%E5%B7%B2%E7%9F%A5%E5%90%91%E9%87%8Fa%3D%EF%BC%88sin%CE%B1%2Ccos%CE%B1%EF%BC%89%2Cb%3D%EF%BC%88cosx%2Csinx%EF%BC%89%2Cc%3D%EF%BC%88sinx%2B2sin%CE%B1%2Ccosx%2B2cos%CE%B1%EF%BC%891.%E8%8B%A5%CE%B1%3D%CF%80%2F4%2C%E6%B1%82%E5%87%BD%E6%95%B0f%EF%BC%88x%EF%BC%89%3Db%C2%B7c%E7%9A%84%E6%9C%80%E5%B0%8F%E5%80%BC%E5%8F%8A%E7%9B%B8%E5%BA%94%E7%9A%84x%E5%80%BC2.%E8%8B%A5a%E4%B8%8Eb%E7%9A%84%E5%A4%B9%E8%A7%92%E4%B8%BA%CF%80%2F3%2C%E4%B8%94a%E2%8A%A5c%2C%E6%B1%82tan2%CE%B1%E7%9A%84%E5%80%BC%E5%BE%88%E6%8A%B1%E6%AD%89%E3%80%82a%3D%EF%BC%88cos%CE%B1%EF%BC%8Csin%CE%B1%EF%BC%89)
xUNQILLdf bb2mbbLyo#)k,*
M(+}?9gO{5hҴ{i23IkR-ܶS][Jڷ휔Bܲ((IVYQlz(1oܵɵ=C/Aoݝ9gSmj-u,0w5=hxzF%^zK4ڔڵ :&[qƘтt1