1.已知函数f(x)=2asin(2x-π/3)+b,定义域为[0,π/2],函数最大值为1,最小值为-5,求a,b的值2.在已知圆内,1rad的圆心角所对弦长为2,则这个圆心角所对弦长为?3.已知sinθ+cosθ=1/5,且π/2≤θ≤3π/4,则cos2θ=?(已
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![1.已知函数f(x)=2asin(2x-π/3)+b,定义域为[0,π/2],函数最大值为1,最小值为-5,求a,b的值2.在已知圆内,1rad的圆心角所对弦长为2,则这个圆心角所对弦长为?3.已知sinθ+cosθ=1/5,且π/2≤θ≤3π/4,则cos2θ=?(已](/uploads/image/z/6928135-7-5.jpg?t=1.%E5%B7%B2%E7%9F%A5%E5%87%BD%E6%95%B0f%28x%29%3D2asin%282x-%CF%80%2F3%29%2Bb%2C%E5%AE%9A%E4%B9%89%E5%9F%9F%E4%B8%BA%5B0%2C%CF%80%2F2%5D%2C%E5%87%BD%E6%95%B0%E6%9C%80%E5%A4%A7%E5%80%BC%E4%B8%BA1%2C%E6%9C%80%E5%B0%8F%E5%80%BC%E4%B8%BA-5%2C%E6%B1%82a%2Cb%E7%9A%84%E5%80%BC2.%E5%9C%A8%E5%B7%B2%E7%9F%A5%E5%9C%86%E5%86%85%2C1rad%E7%9A%84%E5%9C%86%E5%BF%83%E8%A7%92%E6%89%80%E5%AF%B9%E5%BC%A6%E9%95%BF%E4%B8%BA2%2C%E5%88%99%E8%BF%99%E4%B8%AA%E5%9C%86%E5%BF%83%E8%A7%92%E6%89%80%E5%AF%B9%E5%BC%A6%E9%95%BF%E4%B8%BA%3F3.%E5%B7%B2%E7%9F%A5sin%CE%B8%2Bcos%CE%B8%3D1%2F5%2C%E4%B8%94%CF%80%2F2%E2%89%A4%CE%B8%E2%89%A43%CF%80%2F4%2C%E5%88%99cos2%CE%B8%3D%3F%28%E5%B7%B2)
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