已知函数f(x)= m ? n ,其中 m =(sinωx+cosωx, 3 cosωx) , n =(cosωx-sinωx,2sinωx),其中ω>0,若f(x)相邻两对称轴间的距离不小于 π 2 . (Ⅰ)求ω的取值范围; (Ⅱ)在△ABC中,a,b,c分别是角A,B,C的对边,a= 3 ,b+c=3,当ω最大时,f(A)=1,求△ABC的面积.
【简答题】1 Ask for your friend's comments on the weather. 2 Ask about and describe the weather at this time of year 3 Talk about the change of the weather from long rainy days 4 Complain about a cold day.
【简答题】No man can change the weather. Nobody can control the weather. But if we 1 correctly the signs around us we can 2 what the more changes in the weather will be. This way of telling what the weather wil...
【简答题】任选两个任务编写对话 Task 1 : Ask for Mark’s comments on the weather. Task 2 : Ask about and describe the weather at this time of year. Task 3 : Ask Mr. Green about the weather condition tomorrow and plan an ac...