Răspuns:
[tex]x = \frac{\pi}{2} \\ x = \frac{5\pi}{6} \\ x = \frac{3\pi}{2} \\ x = \frac{11\pi}{6}[/tex]
Explicație pas cu pas:
[tex]2x + \frac{\pi}{6} = \frac{7\pi}{6} + 2\pi \: n \\ = > x = \pi \: n + \frac{\pi}{2} \\ 2x + \frac{\pi}{6} = \frac{11\pi}{6} + 2\pi \: n \\ = > x = \pi \: n + \frac{5\pi}{6} \\ x = \frac{\pi}{2} \\ x = \frac{5\pi}{6} \\ x = \frac{3\pi}{2} \\ x = \frac{11\pi}{6}[/tex]
