$\cos^2 x - 3\sin x \cos x + 2\sin^2 x = 0$ denkleminin çözüm kümesi aşağıdakilerden hangisidir?
A) $\{x | x = \frac{\pi}{4} + k\pi, k \in \mathbb{Z}\}$
B) $\{x | x = \frac{\pi}{4} + k\pi \text{ veya } x = \arctan 2 + k\pi, k \in \mathbb{Z}\}$
C) $\{x | x = \arctan 2 + k\pi, k \in \mathbb{Z}\}$
D) $\{x | x = \frac{\pi}{4} + k\pi \text{ veya } x = \frac{3\pi}{4} + k\pi, k \in \mathbb{Z}\}$
