Giải phương trình sinx+cosx=căn 2. sin5x. x=pi/18+kpi/2 và x=pi/9+kpi/3

A. $\left[\begin{array}{l}x=\frac{\pi }{18}+k\frac{\pi }{2}\\ x=\frac{\pi }{9}+k\frac{\pi }{3}\end{array}\right.$

B. $\left[\begin{array}{l}x=\frac{\pi }{12}+k\frac{\pi }{2}\\ x=\frac{\pi }{24}+k\frac{\pi }{3}\end{array}\right.$

C. $\left[\begin{array}{l}x=\frac{\pi }{16}+k\frac{\pi }{2}\\ x=\frac{\pi }{8}+k\frac{\pi }{3}\end{array}\right.$

D. $\left[\begin{array}{l}x=\frac{\pi }{4}+k\frac{\pi }{2}\\ x=\frac{\pi }{6}+k\frac{\pi }{3}\end{array}\right.$