9.设函数f(x)=cos(2x+π/3)+sinx^2 (1)求函数f(x)的最小正周期(2)设△ABC的三个内角A、B、C的对应边分别是a、b、c,若c=根号6,cosB=1/3,f(C/2)=-1/4,求b.
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![9.设函数f(x)=cos(2x+π/3)+sinx^2 (1)求函数f(x)的最小正周期(2)设△ABC的三个内角A、B、C的对应边分别是a、b、c,若c=根号6,cosB=1/3,f(C/2)=-1/4,求b.](/uploads/image/z/699785-17-5.jpg?t=9.%E8%AE%BE%E5%87%BD%E6%95%B0f%28x%29%3Dcos%282x%2B%CF%80%2F3%29%2Bsinx%5E2+%281%29%E6%B1%82%E5%87%BD%E6%95%B0f%28x%29%E7%9A%84%E6%9C%80%E5%B0%8F%E6%AD%A3%E5%91%A8%E6%9C%9F%EF%BC%882%EF%BC%89%E8%AE%BE%E2%96%B3ABC%E7%9A%84%E4%B8%89%E4%B8%AA%E5%86%85%E8%A7%92A%E3%80%81B%E3%80%81C%E7%9A%84%E5%AF%B9%E5%BA%94%E8%BE%B9%E5%88%86%E5%88%AB%E6%98%AFa%E3%80%81b%E3%80%81c%2C%E8%8B%A5c%3D%E6%A0%B9%E5%8F%B76%2CcosB%3D1%2F3%2Cf%28C%2F2%29%3D-1%2F4%2C%E6%B1%82b.)
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