Question

вычислите sin t и cos t если 1) t= п/4 
2) t= 2п/3
3)t=п
4)t=- п/6

Answer 1

1) t=π/4
sin π/4=√2/2
cos π/4=√2/2

2) t=2π/3
sin 2π/3=√3/2
cos 2π/3=-1/2

3) t=π
sin π=0
cos π=-1

4) t=-π/6
sin (-π/6)=-sin π/6=-1/2
cos (-π/6)=cos π/6=√3/2