已知函数f(x)=coswx的最小正周期T>π/3,且f'(π/4)=w,则w=?
|2π/w|>π/3
w=f'(π/4)=-wsinwx|x=π/4=-wsinwπ/4
联立上述方程可得,
w=8k-2
|w|