Определите знак выражения
1. Cos40°
2.sin70°
3.cos113°
4.sin240°
5.cos290°
6.tg98°
7.ctg200°
8.sin(-140°)
9.cos(-300°)
10.tg(-120°)
11.sin п/9
12.cos 13n/15
13.cos 5п/3
14.sin 13п/5
15.tg 5п/11
16.cos(-2п/3)
17.sin(-23/9 п)
18. Cos1
19.sin(-2)
20.tg(п-1)