\(\cos 2x + \sin x + 2 = 0\)
A.\(x = \dfrac{\pi }{2} + k2\pi \,\,\left( {k \in \mathbb{Z} } \right)\)
B.\(x = - \dfrac{\pi }{2} + k2\pi \,\,\left( {k \in \mathbb{Z} } \right)\)
C.\(x = - \dfrac{\pi }{2} + k\pi \,\,\left( {k \in \mathbb{Z} } \right)\)
D.\(x = \dfrac{\pi }{2} + k\pi \,\,\left( {k \in \mathbb{Z} } \right)\)
A.\(x = \dfrac{\pi }{2} + k2\pi \,\,\left( {k \in \mathbb{Z} } \right)\)
B.\(x = - \dfrac{\pi }{2} + k2\pi \,\,\left( {k \in \mathbb{Z} } \right)\)
C.\(x = - \dfrac{\pi }{2} + k\pi \,\,\left( {k \in \mathbb{Z} } \right)\)
D.\(x = \dfrac{\pi }{2} + k\pi \,\,\left( {k \in \mathbb{Z} } \right)\)
Loga
Hóa Học lớp 12
