\( \dfrac{{ \cos \left( { \dfrac{{7 \pi }}{2} - 2x} \right) - \sqrt 3 \cos \left( {2x - 3 \pi } \right) + 2 \cos x}}{{1 - 2 \sin \,x}} = 0 \)
A.\(\left[ \begin{array}{l}x = \dfrac{{5\pi }}{6} + k2\pi \\x = \dfrac{{5\pi }}{{18}} + k\dfrac{{2\pi }}{3}\end{array} \right.\,\,\left( {k \in Z} \right)\)
B.\(x = -\dfrac{{5\pi }}{{18}} + k\dfrac{{2\pi }}{3},k \in \mathbb{Z}\).
C.\(x = \dfrac{{5\pi }}{{18}} + k\dfrac{{2\pi }}{3},k \in \mathbb{Z}\).
D.\(\left[ \begin{array}{l}x =- \dfrac{{5\pi }}{6} + k2\pi \\x =- \dfrac{{5\pi }}{{18}} + k\dfrac{{2\pi }}{3}\end{array} \right.\,\,\left( {k \in Z} \right)\)
A.\(\left[ \begin{array}{l}x = \dfrac{{5\pi }}{6} + k2\pi \\x = \dfrac{{5\pi }}{{18}} + k\dfrac{{2\pi }}{3}\end{array} \right.\,\,\left( {k \in Z} \right)\)
B.\(x = -\dfrac{{5\pi }}{{18}} + k\dfrac{{2\pi }}{3},k \in \mathbb{Z}\).
C.\(x = \dfrac{{5\pi }}{{18}} + k\dfrac{{2\pi }}{3},k \in \mathbb{Z}\).
D.\(\left[ \begin{array}{l}x =- \dfrac{{5\pi }}{6} + k2\pi \\x =- \dfrac{{5\pi }}{{18}} + k\dfrac{{2\pi }}{3}\end{array} \right.\,\,\left( {k \in Z} \right)\)
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