设函数f(x)=sin^2x-sin(2x-π/6)(1)求函数f(x)值域(2)设A,B,C为三角形ABc的三个内角,若cosB=1/3,f(C/2)=-1/4,且C为锐角求sinA
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![设函数f(x)=sin^2x-sin(2x-π/6)(1)求函数f(x)值域(2)设A,B,C为三角形ABc的三个内角,若cosB=1/3,f(C/2)=-1/4,且C为锐角求sinA](/uploads/image/z/6463495-55-5.jpg?t=%E8%AE%BE%E5%87%BD%E6%95%B0f%28x%29%3Dsin%5E2x-sin%282x-%CF%80%2F6%29%281%29%E6%B1%82%E5%87%BD%E6%95%B0f%28x%29%E5%80%BC%E5%9F%9F%282%29%E8%AE%BEA%2CB%2CC%E4%B8%BA%E4%B8%89%E8%A7%92%E5%BD%A2ABc%E7%9A%84%E4%B8%89%E4%B8%AA%E5%86%85%E8%A7%92%2C%E8%8B%A5cosB%3D1%2F3%2Cf%28C%2F2%29%3D-1%2F4%2C%E4%B8%94C%E4%B8%BA%E9%94%90%E8%A7%92%E6%B1%82sinA)
设函数f(x)=sin^2x-sin(2x-π/6)(1)求函数f(x)值域(2)设A,B,C为三角形ABc的三个内角,若cosB=1/3,f(C/2)=-1/4,且C为锐角求sinA
设函数f(x)=sin^2x-sin(2x-π/6)
(1)求函数f(x)值域
(2)设A,B,C为三角形ABc的三个内角,若cosB=1/3,f(C/2)=-1/4,且C为锐角求sinA
设函数f(x)=sin^2x-sin(2x-π/6)(1)求函数f(x)值域(2)设A,B,C为三角形ABc的三个内角,若cosB=1/3,f(C/2)=-1/4,且C为锐角求sinA
函数f(x)=sin^2x-sin(2x-π/6)
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(1)求函数f(x)值域
(2)设A,B,C为三角形ABc的三个内角,若cosB=1/3,f(C/2)=-1/4,且C为锐角求sinA
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