设函数f(x)=sin(2x+π/6)+2cos平方x (1)求函数f(x)的最大值和递减区间(2)设A,B,C为三角形ABC的三个内角,cosB=π/3,f(C/2)=5/2,且C为锐角,求sinA
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![设函数f(x)=sin(2x+π/6)+2cos平方x (1)求函数f(x)的最大值和递减区间(2)设A,B,C为三角形ABC的三个内角,cosB=π/3,f(C/2)=5/2,且C为锐角,求sinA](/uploads/image/z/5919374-38-4.jpg?t=%E8%AE%BE%E5%87%BD%E6%95%B0f%28x%29%3Dsin%282x%2B%CF%80%2F6%29%2B2cos%E5%B9%B3%E6%96%B9x+%EF%BC%881%EF%BC%89%E6%B1%82%E5%87%BD%E6%95%B0f%28x%29%E7%9A%84%E6%9C%80%E5%A4%A7%E5%80%BC%E5%92%8C%E9%80%92%E5%87%8F%E5%8C%BA%E9%97%B4%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%2CcosB%3D%CF%80%2F3%2Cf%28C%2F2%29%3D5%2F2%2C%E4%B8%94C%E4%B8%BA%E9%94%90%E8%A7%92%2C%E6%B1%82sinA)
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