\(2{ \sin ^2}x - 3 \sin x + 1 = 0 \)
A.\(\left[ {\begin{array}{*{20}{l}}{x = \dfrac{\pi }{2} + k\pi }\\{x = \dfrac{\pi }{6} + k2\pi }\\{x = \dfrac{{5\pi }}{6} + k2\pi }\end{array}} \right.{\mkern 1mu} {\mkern 1mu} \left( {k \in Z} \right)\)
B.\(\left[ \begin{array}{l}x = \dfrac{\pi }{2} + k\pi \\x = \pm \dfrac{\pi }{6} + k2\pi \end{array} \right.{\mkern 1mu} {\mkern 1mu} \left( {k \in Z} \right)\)
C.\(\left[ \begin{array}{l}x = \dfrac{\pi }{2} + k2\pi \\x = \pm \dfrac{\pi }{6} + k2\pi \end{array} \right.{\mkern 1mu} {\mkern 1mu} \left( {k \in Z} \right)\)
D.\(\left[ \begin{array}{l}x = \dfrac{\pi }{2} + k\pi \\x = \pm \dfrac{\pi }{6} + k\pi \end{array} \right.{\mkern 1mu} {\mkern 1mu} \left( {k \in Z} \right)\)
A.\(\left[ {\begin{array}{*{20}{l}}{x = \dfrac{\pi }{2} + k\pi }\\{x = \dfrac{\pi }{6} + k2\pi }\\{x = \dfrac{{5\pi }}{6} + k2\pi }\end{array}} \right.{\mkern 1mu} {\mkern 1mu} \left( {k \in Z} \right)\)
B.\(\left[ \begin{array}{l}x = \dfrac{\pi }{2} + k\pi \\x = \pm \dfrac{\pi }{6} + k2\pi \end{array} \right.{\mkern 1mu} {\mkern 1mu} \left( {k \in Z} \right)\)
C.\(\left[ \begin{array}{l}x = \dfrac{\pi }{2} + k2\pi \\x = \pm \dfrac{\pi }{6} + k2\pi \end{array} \right.{\mkern 1mu} {\mkern 1mu} \left( {k \in Z} \right)\)
D.\(\left[ \begin{array}{l}x = \dfrac{\pi }{2} + k\pi \\x = \pm \dfrac{\pi }{6} + k\pi \end{array} \right.{\mkern 1mu} {\mkern 1mu} \left( {k \in Z} \right)\)
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Hóa Học lớp 12
