Решить уравнение \(f^\prime(x)=0\) , где \(f(x)=\cos^2{x}+\sin{x}-1\)

• \(\frac{\pi}{2}+{\pi}{n}; n\in{Z}\)
• \(\frac{\pi}{6}+2{\pi}{n}; n\in{Z}\)
• \(\frac{5\pi}{6}+2{\pi}{n}; n\in{Z}\)
• \(-\frac{\pi}{6}+2{\pi}{n}; n\in{Z}\)
• \(\frac{7\pi}{6}+2{\pi}{n}; n\in{Z}\)
• \(-\frac{2\pi}{3}+2{\pi}{n}; n\in{Z}\)
• \(\frac{2\pi}{3}+2{\pi}{n}; n\in{Z}\)
• \({\pi}+2{\pi}{n}; n\in{Z}\)
• решений нет
• \(2{\pi}{n}; n\in{Z}\)