Phương trình \(4{\sin ^2}2x - 4\cos 2x - 1 = 0\) có nghiệm là:
A.\(x = \pm \dfrac{\pi }{6} + k\pi ,\,\,k \in Z\)
B.\(x = \pm \dfrac{\pi }{3} + k\pi ,\,\,k \in Z\)
C.\(x = \pm \dfrac{\pi }{6} + k2\pi ,\,\,k \in Z\)
D.\(x = \pm \dfrac{{2\pi }}{3} + k\pi ,\,\,k \in Z\)
A.\(x = \pm \dfrac{\pi }{6} + k\pi ,\,\,k \in Z\)
B.\(x = \pm \dfrac{\pi }{3} + k\pi ,\,\,k \in Z\)
C.\(x = \pm \dfrac{\pi }{6} + k2\pi ,\,\,k \in Z\)
D.\(x = \pm \dfrac{{2\pi }}{3} + k\pi ,\,\,k \in Z\)
Loga
Hóa Học lớp 12
