13 задача ЕГЭ (старый)
1.5. Таблица значений синусов и косинусов
\(\DeclareMathOperator{\tg}{tg} \DeclareMathOperator{\ctg}{ctg}\)
Таблица значений тригонометрических функций
$$x$$ | $$0$$ | $$\frac{\pi}{6}$$ | $$\frac{\pi}{4}$$ | $$\frac{\pi}{3}$$ | $$\frac{\pi}{2}$$ | $$\pi$$ | $$\frac{3\pi}{2}$$ | $$2\pi$$ |
$$\sin x$$ | $$0$$ | $$\frac12$$ | $$\frac{\sqrt2}{2}$$ | $$\frac{\sqrt3}{2}$$ | $$1$$ | $$0$$ | $$-1$$ | $$0$$ |
$$\cos x$$ | $$1$$ | $$\frac{\sqrt3}{2}$$ | $$\frac{\sqrt2}{2}$$ | $$\frac12$$ | $$0$$ | $$-1$$ | $$0$$ | $$1$$ |
$$\tg x$$ | $$0$$ | $$\frac{1}{\sqrt3}$$ | $$1$$ | $$\sqrt3$$ | $$-$$ | $$0$$ | $$-$$ | $$0$$ |
$$\ctg x$$ | $$-$$ | $$\sqrt3$$ | $$1$$ | $$\frac{1}{\sqrt3}$$ | $$0$$ | $$-$$ | $$0$$ | $$-$$ |