\({ \cos ^3}x + 2 \sin x{ \cos ^2}x - 3{ \sin ^3}x = 0. \)
A.\(x = \frac{\pi }{4} + k\pi \left( {k \in Z} \right)\)
B.\(x = \frac{\pi }{4} + k2\pi \left( {k \in Z} \right)\)
C.\(x = - \frac{\pi }{4} + k\pi \left( {k \in Z} \right)\)
D.\(x = - \frac{\pi }{4} + k2\pi \left( {k \in Z} \right)\)
Loga
Hóa Học lớp 12
