# тригонометрия

## 16 questions

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• Multiple Choice
3 minutes
1 pt

$\ tgx\le\sqrt{3}$

$\left[\frac{\pi}{3}+\pi n;\frac{\pi}{2}+\pi n\right]$

$\left[\frac{\pi}{3}+\pi n;\frac{\pi}{2}+\pi n\right)$

$\left[-\frac{\pi}{2}+\pi n;\frac{\pi}{3}+\pi n\right)$

$\left(-\frac{\pi}{2}+\pi n;\frac{\pi}{3}+\pi n\right]$

• Multiple Choice
2 minutes
1 pt

$\sin3x\ge\frac{1}{\sqrt{2}}$

$\left[\frac{\pi}{12}+\frac{2\pi n}{3};\frac{\pi}{4}+\frac{2\pi n}{3};\right]$

$\left[\frac{\pi}{4}+2\pi n;\frac{3\pi}{4}+2\pi n;\right]$

$\left[-\frac{\pi}{12}+2\pi n;\frac{\pi}{4}+2\pi n;\right]$

$\left[\frac{3\pi}{4}+6\pi n;\frac{\pi}{4}+6\pi n;\right]$

• Multiple Choice
3 minutes
1 pt

$\cos2x>-\frac{\sqrt{3}}{2}$

$\left(-\frac{5\pi}{12}+\frac{2\pi n}{2};\frac{5\pi}{4}+\frac{2\pi n}{2};\right)$

$\left(-\frac{5\pi}{12}+\frac{2\pi n}{2};\frac{5\pi}{12}+\frac{2\pi n}{2};\right)$

$\left(-\frac{\pi}{12}+2\pi n;\frac{\pi}{4}+2\pi n;\right)$

$\left(-\frac{2\pi}{3}+\frac{2\pi n}{2};\frac{2\pi}{3}+\frac{2\pi n}{2};\right)$