Найдите значение 1) cos 1110° 2) ctg(-29n/3)

Question

Найдите значение
1) cos 1110°
2) ctg(-29n/3)

Answer 1

1)Cos1110° = Cos(1080 + 30) = Cos30° = √3/2
2) Ctg(- 29П/3) = - Ctg(10П - П/3) = CtgП/3 = 1/√3