Phương trình \(\sin \left( {5\pi - 3x} \right) - 4{\sin ^3}\left( {\frac{{9\pi }}{2} - x} \right) = 1 - 3\cos x\)có nghiệm là ?
A.\(\left[ \begin{array}{l}x = - \frac{\pi }{6} + \frac{{k2\pi }}{3}\\x = \frac{\pi }{3} + \frac{{m2\pi }}{3}\end{array} \right.\;\;\left( {k,\;m \in Z} \right)\)
B.\(\left[ \begin{array}{l}x = \frac{\pi }{6} + \frac{{k2\pi }}{3}\\x = \frac{\pi }{4} + \frac{{m2\pi }}{3}\end{array} \right.\;\;\left( {k,\;m \in Z} \right)\)
C.\(\left[ \begin{array}{l}x = - \frac{\pi }{6} + \frac{{k2\pi }}{3}\\x = - \frac{\pi }{3} + \frac{{m2\pi }}{3}\end{array} \right.\;\;\left( {k,\;m \in Z} \right)\)
D.\(\left[ \begin{array}{l}x = \frac{\pi }{6} + \frac{{k2\pi }}{3}\\x = \frac{\pi }{3} + \frac{{m2\pi }}{3}\end{array} \right.\;\;\left( {k,\;m \in Z} \right)\)
A.\(\left[ \begin{array}{l}x = - \frac{\pi }{6} + \frac{{k2\pi }}{3}\\x = \frac{\pi }{3} + \frac{{m2\pi }}{3}\end{array} \right.\;\;\left( {k,\;m \in Z} \right)\)
B.\(\left[ \begin{array}{l}x = \frac{\pi }{6} + \frac{{k2\pi }}{3}\\x = \frac{\pi }{4} + \frac{{m2\pi }}{3}\end{array} \right.\;\;\left( {k,\;m \in Z} \right)\)
C.\(\left[ \begin{array}{l}x = - \frac{\pi }{6} + \frac{{k2\pi }}{3}\\x = - \frac{\pi }{3} + \frac{{m2\pi }}{3}\end{array} \right.\;\;\left( {k,\;m \in Z} \right)\)
D.\(\left[ \begin{array}{l}x = \frac{\pi }{6} + \frac{{k2\pi }}{3}\\x = \frac{\pi }{3} + \frac{{m2\pi }}{3}\end{array} \right.\;\;\left( {k,\;m \in Z} \right)\)
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Hóa Học lớp 12
