1. А) = sin(2pi+pi/3)=sin pi/3= (кор3)/2
Б) =cos (pi+pi/4)=-cos pi/4=-(кор2)/2
В) =-tg(2pi+pi/6)=-tg pi/6=-(кор3)/3
Г) =0
2. А) t=а/6+2пr
t=5п/6+2Пr
Б) t=5П/6+2Пr
t=-5П/6+2Пr
3.cost/sint * (-sint) + cos (-t) = -cost + cost = 0
4. ctgt/tgt+ctgt = cost:sint/cost:sint+sint:cost = cost:sint/cos^2 t+sin^2 t:sint*cost = cost:sint/1: sint*cost = cost*sint*cost/sint*1 =cos^2 t
5. =2sin(150)+2кор3*cos(3П/2-60)-tg^2 60=2*(1/2)-2кор3*sin(60)-tg^2(60)=1-3-3=-5