题目

He was about to tell me the matter _______someone stopped him    A. as     B. while     C. when        D. until   答案:C已知函数f(x)=2sinωx+cos(ωx+π6)-sin(ωx-π3)-1(其中ω>0,x∈R)的最小正周期为4π.(Ⅰ)求f(x)的最大值和最小值及相应的x的值;(Ⅱ)在△ABC中,若角A、B、C所对边分别为a、b、c,且f(B)=1,b=33,a+c=36,求sinAsinC的值.
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