Cho hàm số $f\left( x \right) = \sin 2x$ liên tục trên $\mathbb{R}$ . a) $\int\limits_0^\pi {f\left( x \right)dx} = 0$ . b) Biết $F\left( 0 \right) = \frac{1}{2}$ thì $F\left( {\frac{\pi }{2}} \right) = 1$ . c) $\int\limits_0^{\frac{\pi }{2}} {\left( {\cos x - f\left( x \right)} \right)dx = 2}$ . d) $\int\limits_{ - \pi }^\pi {\left| {f\left( x \right)} \right|dx = 4}$ .

Cho hàm số $f\left( x \right) = \sin 2x$ liên tục trên $\mathbb{R}$ .

a) $\int\limits_0^\pi {f\left( x \right)dx} = 0$ .

b) Biết $F\left( 0 \right) = \frac{1}{2}$ thì $F\left( {\frac{\pi }{2}} \right) = 1$ .

c) $\int\limits_0^{\frac{\pi }{2}} {\left( {\cos x - f\left( x \right)} \right)dx = 2}$ .

d) $\int\limits_{ - \pi }^\pi {\left| {f\left( x \right)} \right|dx = 4}$ .