Сравни числа. (50 баллов).
1. sin281° и sin318°
2. cos75° и cos21°
3. sin(−8π/7) и sin(−9π/8)
4. tg3π/4 и tg4π/5

[tex] \sin(281) < \sin(318) \\ \cos(75) < \cos(21) \\ \sin( - \frac{8\pi}{7} ) > \sin( - \frac{9\pi}{8} ) \\ \tan( \frac{3\pi}{4} ) < \tan( \frac{4\pi}{5} ) [/tex]