Cho \(\int\limits_0^1 {f\left( x \right)} \,dx = 2...

Câu hỏi: Cho \(\int\limits_0^1 {f\left( x \right)} \,dx = 2018\). Tích phân \(\int\limits_0^{\frac{\pi }{4}} {f\left( {\sin 2x} \right)\cos 2x.dx} \) bằng:                                        

A  \(2018\).                     

B  \( - 1009\).                 

C  \( - 2018\).                 

D  \(1009\).