Giải pt (sinx-1).cosx=0

$\begin{array}{l} \left( {\sin x - 1} \right).\cos x = 0\\ \Rightarrow \left[ \begin{array}{l} \sin x - 1 = 0\\ \cos x = 0 \end{array} \right. \Rightarrow \left[ \begin{array}{l} \sin x = 1\\ x = \frac{\pi }{2} + k\pi \end{array} \right. \Rightarrow \left[ \begin{array}{l} x = \frac{\pi }{2} + k2\pi \\ x = \frac{\pi }{2} + k\pi \end{array} \right. \end{array}$