已知函数f(x)=2cosωx(ω>0),且函数y=f(x)图像的两条相邻对称轴间的距离为π/2.(1)求f(π/8)的值(2)将函数y=f(x)向右π/6,横坐标伸长4倍,得y=g(x)的图像,求g(x)的单调递减区间
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![已知函数f(x)=2cosωx(ω>0),且函数y=f(x)图像的两条相邻对称轴间的距离为π/2.(1)求f(π/8)的值(2)将函数y=f(x)向右π/6,横坐标伸长4倍,得y=g(x)的图像,求g(x)的单调递减区间](/uploads/image/z/1981102-22-2.jpg?t=%E5%B7%B2%E7%9F%A5%E5%87%BD%E6%95%B0f%28x%29%3D2cos%CF%89x%28%CF%89%3E0%29%2C%E4%B8%94%E5%87%BD%E6%95%B0y%3Df%28x%29%E5%9B%BE%E5%83%8F%E7%9A%84%E4%B8%A4%E6%9D%A1%E7%9B%B8%E9%82%BB%E5%AF%B9%E7%A7%B0%E8%BD%B4%E9%97%B4%E7%9A%84%E8%B7%9D%E7%A6%BB%E4%B8%BA%CF%80%2F2.%281%EF%BC%89%E6%B1%82f%28%CF%80%2F8%29%E7%9A%84%E5%80%BC%282%29%E5%B0%86%E5%87%BD%E6%95%B0y%3Df%28x%29%E5%90%91%E5%8F%B3%CF%80%2F6%2C%E6%A8%AA%E5%9D%90%E6%A0%87%E4%BC%B8%E9%95%BF4%E5%80%8D%2C%E5%BE%97y%3Dg%28x%29%E7%9A%84%E5%9B%BE%E5%83%8F%2C%E6%B1%82g%28x%29%E7%9A%84%E5%8D%95%E8%B0%83%E9%80%92%E5%87%8F%E5%8C%BA%E9%97%B4)
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