Câu hỏi
Nghiệm của phương trình \(\sin^2 x - \sin^2 x \cdot \cos^2 x = 1\) là:
A
\(x = \frac{\pi}{4} + k2\pi, x = -\frac{\pi}{4} + k2\pi, k \in \mathbb{Z}\)
B
\(x = \frac{\pi}{4} + k2\pi, x = -\frac{\pi}{3} + k2\pi, k \in \mathbb{Z}\)
C
\(x = \frac{\pi}{6} + k2\pi, x = -\frac{\pi}{3} + k2\pi, k \in \mathbb{Z}\)
D
\(x = \frac{\pi}{2} + k\pi, k \in \mathbb{Z}\)