A.\(\int {{{\cos }^2}2xdx}  = \dfrac{x}{2} + \dfrac{1}{8}\sin 4x + C\)
B.\(\int {{{\sin }^2}2xdx}  = \dfrac{x}{2} - \dfrac{1}{8}\sin 4x + C\)
C.\(\int {\cos 4xdx}  = \dfrac{1}{4}\sin 4x + C\)
D.\(\int {{{\cos }^2}2xdx}  =  - {\cos ^2}2x + C\)

A.\(\int {\cos 3x\cos xdx}  = \dfrac{1}{2}\left( {\dfrac{1}{4}\sin 4x + \dfrac{1}{2}\sin 2x} \right) + C\)
B.\(\int {\sin 3x\cos xdx}  = \dfrac{{ - 1}}{2}\left( {\dfrac{1}{4}\cos 4x + \dfrac{1}{2}\sin 2x} \right) + C\)
C.\(\int {\sin 3x\cos xdx}  = \dfrac{{ - 1}}{2}\left( {\dfrac{1}{4}\cos 4x + \dfrac{1}{2}\cos 2x} \right) + C\)
D.\(\int {\sin x\cos xdx}  = \dfrac{{ - \cos 2x}}{4} + C\)

A.\(\dfrac{1}{3}{\sin ^3}x - \dfrac{1}{5}{\sin ^5}x + C\)
B.\( - \dfrac{1}{3}{\sin ^3}x + \dfrac{1}{5}{\sin ^5}x + C\)
C.\({\sin ^3}x - {\sin ^5}x + C\)
D.Đáp án khác

A.\(\cos x + {\sin ^2}x - \dfrac{{{{\sin }^3}x}}{3} - \dfrac{{{{\cos }^4}x}}{4} + C\)
B.\(\sin x + \dfrac{{{{\sin }^2}x}}{2} - \dfrac{{{{\sin }^3}x}}{3} - \dfrac{{{{\cos }^4}x}}{4} + C\)
C.\( - \dfrac{{{{\sin }^4}x}}{4} - \dfrac{{{{\sin }^3}x}}{3} + \dfrac{{{{\cos }^2}x}}{2} + \sin x + C\)
D.\( - \dfrac{{{{\sin }^4}x}}{4} - \dfrac{{{{\sin }^3}x}}{3} + \dfrac{{{{\cos }^2}x}}{2} - \sin x + C\)

A.\(\cos x + {\sin ^2}x - \dfrac{{{{\sin }^3}x}}{3} - \dfrac{{{{\cos }^4}x}}{4} + C\)
B.\(\sin x + \dfrac{{{{\sin }^2}x}}{2} - \dfrac{{{{\sin }^3}x}}{3} - \dfrac{{{{\cos }^4}x}}{4} + C\)
C.\( - \dfrac{{{{\sin }^4}x}}{4} - \dfrac{{{{\sin }^3}x}}{3} + \dfrac{{{{\cos }^2}x}}{2} + \sin x + C\)
D.\( - \dfrac{{{{\sin }^4}x}}{4} - \dfrac{{{{\sin }^3}x}}{3} + \dfrac{{{{\cos }^2}x}}{2} - \sin x + C\)

A.\(2x - \dfrac{1}{{10}}\sin 10x - \dfrac{1}{5}\cos 10x\)
B.\(2x - \dfrac{1}{{10}}\sin 10x - \dfrac{2}{5}\cos 10x\)
C.\(2x - \dfrac{1}{5}\sin 10x - \dfrac{1}{{10}}\cos 10x\)
D.\(2x - \dfrac{3}{{10}}\sin 10x - \dfrac{2}{5}\cos 10x\)

A.\( - \dfrac{1}{6}\cos 6x - \dfrac{1}{2}\cos 2x + 6\)
B.\( - \dfrac{1}{6}\cos 6x - \dfrac{3}{2}\cos 2x + 6\)
C.\( - \dfrac{1}{6}\cos 6x - \dfrac{{\sqrt 3 }}{2}\cos 2x + 8\)
D.\( - \dfrac{1}{6}\cos 6x - \dfrac{5}{2}\sin 2x + 8\)

A.
B.
C.
D.

A.4
B.5
C.0
D.6

A.2
B.4
C.0
D.8