Решите уравнение \(10sin^2x+5sinxcosx +cos^2x=3.\)

• \(-\frac{\pi}{4}+\pi n, n \in Z\)
• \(-\pi+\pi n, n \in Z\)
• \(arctg\frac{2}{7}+\pi n, n \in Z\)
• \(-arctg\frac{2}{7}+\pi n, n \in Z\)