Сtg(t+π)=ctgt=3,πsin²t=1:(1+ctg²t)=1/10 sint=-1/√10 cost=-√(1-sin²t)=-√(1-1/10)=-√(9/10)=-3/√10 tgt=sint/cost=-1/√10:3/√10=-1/√10*√10/3=-1/3 cos(t-2π)=cost=-3/√10 sin(4π-t)=-sint=1/√10 tg(t-π)=tgt=-1/3