\({\sin ^2}x - 3\sin x\cos x = - 1.\)
A.\(\left[ \begin{array}{l}x = - \frac{\pi }{4} + k\pi \\x = \arctan \left( { - \frac{1}{2}} \right) + k\pi \end{array} \right.\,\,\,\,\left( {k \in \mathbb{Z}} \right)\)
B.\(\left[ \begin{array}{l}x = \frac{\pi }{4} + k\pi \\x = \arctan \frac{1}{2} + k\pi \end{array} \right.\,\,\,\,\left( {k \in \mathbb{Z}} \right)\)
C.\(\left[ \begin{array}{l}x = \frac{\pi }{4} + k2\pi \\x = \arctan \frac{1}{2} + k2\pi \end{array} \right.\,\,\,\,\left( {k \in \mathbb{Z}} \right)\)
D.\(\left[ \begin{array}{l}x = - \frac{\pi }{4} + k2\pi \\x = \arctan \left( { - \frac{1}{2}} \right) + k2\pi \end{array} \right.\,\,\,\,\left( {k \in \mathbb{Z}} \right)\)
A.\(\left[ \begin{array}{l}x = - \frac{\pi }{4} + k\pi \\x = \arctan \left( { - \frac{1}{2}} \right) + k\pi \end{array} \right.\,\,\,\,\left( {k \in \mathbb{Z}} \right)\)
B.\(\left[ \begin{array}{l}x = \frac{\pi }{4} + k\pi \\x = \arctan \frac{1}{2} + k\pi \end{array} \right.\,\,\,\,\left( {k \in \mathbb{Z}} \right)\)
C.\(\left[ \begin{array}{l}x = \frac{\pi }{4} + k2\pi \\x = \arctan \frac{1}{2} + k2\pi \end{array} \right.\,\,\,\,\left( {k \in \mathbb{Z}} \right)\)
D.\(\left[ \begin{array}{l}x = - \frac{\pi }{4} + k2\pi \\x = \arctan \left( { - \frac{1}{2}} \right) + k2\pi \end{array} \right.\,\,\,\,\left( {k \in \mathbb{Z}} \right)\)
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Hóa Học lớp 12
