已知向量m=(cosx,-1),n=(sinx,-2分之3),f(x)=(m-n)×m(1)求函数f(x)单调增区间 (2)已知锐角三角形ABC中角A,B,C的对边分别为a,b,c其面积为根号3,f(A -8分之派)=-(4分之根
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![已知向量m=(cosx,-1),n=(sinx,-2分之3),f(x)=(m-n)×m(1)求函数f(x)单调增区间 (2)已知锐角三角形ABC中角A,B,C的对边分别为a,b,c其面积为根号3,f(A -8分之派)=-(4分之根](/uploads/image/z/3197605-13-5.jpg?t=%E5%B7%B2%E7%9F%A5%E5%90%91%E9%87%8Fm%EF%BC%9D%EF%BC%88cosx%2C%EF%BC%8D1%EF%BC%89%2Cn%EF%BC%9D%EF%BC%88sinx%2C%EF%BC%8D2%E5%88%86%E4%B9%8B3%EF%BC%89%2Cf%EF%BC%88x%EF%BC%89%EF%BC%9D%EF%BC%88m%EF%BC%8Dn%EF%BC%89%C3%97m%EF%BC%881%EF%BC%89%E6%B1%82%E5%87%BD%E6%95%B0f%EF%BC%88x%EF%BC%89%E5%8D%95%E8%B0%83%E5%A2%9E%E5%8C%BA%E9%97%B4+%EF%BC%882%EF%BC%89%E5%B7%B2%E7%9F%A5%E9%94%90%E8%A7%92%E4%B8%89%E8%A7%92%E5%BD%A2ABC%E4%B8%AD%E8%A7%92A%2CB%2CC%E7%9A%84%E5%AF%B9%E8%BE%B9%E5%88%86%E5%88%AB%E4%B8%BAa%2Cb%2Cc%E5%85%B6%E9%9D%A2%E7%A7%AF%E4%B8%BA%E6%A0%B9%E5%8F%B73%2Cf%EF%BC%88A+%EF%BC%8D8%E5%88%86%E4%B9%8B%E6%B4%BE%EF%BC%89%EF%BC%9D%EF%BC%8D%EF%BC%884%E5%88%86%E4%B9%8B%E6%A0%B9)
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已知向量m=(cosx,-1),n=(sinx,-2分之3),f(x)=(m-n)×m(1)求函数f(x)单调增区间 (2)已知锐角三角形ABC中角A,B,C的对边分别为a,b,c其面积为根号3,f(A -8分之派)=-(4分之根
已知向量m=(cosx,-1),n=(sinx,-2分之3),f(x)=(m-n)×m
(1)求函数f(x)单调增区间 (2)已知锐角三角形ABC中角A,B,C的对边分别为a,b,c其面积为根号3,f(A -8分之派)=-(4分之根号2),a=3,求b+c的值
已知向量m=(cosx,-1),n=(sinx,-2分之3),f(x)=(m-n)×m(1)求函数f(x)单调增区间 (2)已知锐角三角形ABC中角A,B,C的对边分别为a,b,c其面积为根号3,f(A -8分之派)=-(4分之根