已知f(x)=sin方x+acosx+5/8a-3/2,a∈R.已知f(x)=sin方x+acosx+5/8a-3/2,a∈R.1)当a=1时,求函数f(x)的最大值; 2)如果对于区间[0,π/2]上的任意一个x,都有f(x)≤1成立,求a的取值范围.
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