1) -0.7071067812
2) -0.5
3) 0.5773502692
4) -0.7071067812
5) 0
6) -1/2
7) 1/2
8) ctg 5pi/3 = ctg (2 pi - pi/3) = - ctg pi/3 = - √3/3
9)
10)сos (-7π/3) = cos 7π/3 = cos (2π + π/3) = cos π/3 = 0.5
1) -0.7071067812
2) -0.5
3) 0.5773502692
4) -0.7071067812
5) 0
6) -1/2
7) 1/2
8) ctg 5pi/3 = ctg (2 pi - pi/3) = - ctg pi/3 = - √3/3
9)
10)сos (-7π/3) = cos 7π/3 = cos (2π + π/3) = cos π/3 = 0.5