Giải phương trình : \(2\sin x + \sqrt 3 = 0.\)
A.\(x = - \dfrac{\pi }{3} + k2\pi ;\,\,x = \dfrac{{4\pi }}{3} + k2\pi \,\left( {k \in \mathbb{Z}} \right).\)
B.\(x = \dfrac{\pi }{3} + k2\pi ;\,\,x = \dfrac{{4\pi }}{3} + k2\pi \,\left( {k \in \mathbb{Z}} \right).\)
C.\(x = \dfrac{\pi }{3} + k2\pi ;\,\,x = -\dfrac{{4\pi }}{3} + k2\pi \,\left( {k \in \mathbb{Z}} \right).\)
D.\(x = -\dfrac{\pi }{3} + k2\pi ;\,\,x = -\dfrac{{4\pi }}{3} + k2\pi \,\left( {k \in \mathbb{Z}} \right).\)
A.\(x = - \dfrac{\pi }{3} + k2\pi ;\,\,x = \dfrac{{4\pi }}{3} + k2\pi \,\left( {k \in \mathbb{Z}} \right).\)
B.\(x = \dfrac{\pi }{3} + k2\pi ;\,\,x = \dfrac{{4\pi }}{3} + k2\pi \,\left( {k \in \mathbb{Z}} \right).\)
C.\(x = \dfrac{\pi }{3} + k2\pi ;\,\,x = -\dfrac{{4\pi }}{3} + k2\pi \,\left( {k \in \mathbb{Z}} \right).\)
D.\(x = -\dfrac{\pi }{3} + k2\pi ;\,\,x = -\dfrac{{4\pi }}{3} + k2\pi \,\left( {k \in \mathbb{Z}} \right).\)
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