Nghiệm của phương trình \(\cos 7x + \sin (2x - \frac{\pi }{5}) = 0\) là:

A. \(\left[ \begin{array}{l}
x = \frac{\pi }{{50}} + \frac{{k2\pi }}{5}\\
x = \frac{{17\pi }}{{90}} + \frac{{k\pi }}{9}
\end{array} \right.\;\left( {k \in Z} \right)\)

B. \(\left[ \begin{array}{l}
x =  - \frac{{3\pi }}{{50}} + \frac{{k2\pi }}{5}\\
x = \frac{{17\pi }}{{30}} + \frac{{k\pi }}{9}
\end{array} \right.\;\left( {k \in Z} \right)\)

C. \(\left[ \begin{array}{l}
x = \frac{\pi }{{50}} + \frac{{k2\pi }}{5}\\
x = \frac{\pi }{{30}} + \frac{{k2\pi }}{9}
\end{array} \right.\;\left( {k \in Z} \right)\)

D. \(\left[ \begin{array}{l}
x = \frac{{3\pi }}{{50}} + \frac{{k2\pi }}{5}\\
x = \frac{{17\pi }}{{90}} + \frac{{k2\pi }}{9}
\end{array} \right.\;\left( {k \in Z} \right)\)