已知f(x)=cos^2x+sinxcosx g(x)=2sin(x+π/4)sin(x-π/4)1、求f(x)的最小正周期及单调增区间2、若f(a)+g(a)=5/6,且a属于[3π/8,5π/8]求sin2a的值尽量这两天,
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![已知f(x)=cos^2x+sinxcosx g(x)=2sin(x+π/4)sin(x-π/4)1、求f(x)的最小正周期及单调增区间2、若f(a)+g(a)=5/6,且a属于[3π/8,5π/8]求sin2a的值尽量这两天,](/uploads/image/z/1857342-30-2.jpg?t=%E5%B7%B2%E7%9F%A5f%28x%29%3Dcos%5E2x%2Bsinxcosx+g%28x%29%3D2sin%28x%2B%CF%80%2F4%29sin%28x-%CF%80%2F4%291%E3%80%81%E6%B1%82f%EF%BC%88x%EF%BC%89%E7%9A%84%E6%9C%80%E5%B0%8F%E6%AD%A3%E5%91%A8%E6%9C%9F%E5%8F%8A%E5%8D%95%E8%B0%83%E5%A2%9E%E5%8C%BA%E9%97%B42%E3%80%81%E8%8B%A5f%EF%BC%88a%EF%BC%89%2Bg%EF%BC%88a%EF%BC%89%3D5%2F6%2C%E4%B8%94a%E5%B1%9E%E4%BA%8E%5B3%CF%80%2F8%2C5%CF%80%2F8%5D%E6%B1%82sin2a%E7%9A%84%E5%80%BC%E5%B0%BD%E9%87%8F%E8%BF%99%E4%B8%A4%E5%A4%A9%EF%BC%8C)
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