Mike
saw a film
John
cleaned the room
Wu Yifan
had a cold
Chen Jie
read a book
Zhang Peng
went fishing
已知函数f(x)=( (3sinω2x+cosω2x)cosω2x−12 cos ω2x−12 (ω>0)的最小正周期为2π
(Ⅰ)求ω的值;
(Ⅱ)在△ABC中,角A、B、C的对边分别是a,b,c,且满足(2a﹣c)cosB=bcosC,求函数f(A)的取值范围.
“人必自尊而人尊之,人必尊人而人尊之。”对这句话的正确理解是( )