y=2sin(x+п/6)+1 при x=4п/3

Question

y=2sin(x+п/6)+1 при x=4п/3

Answer 1

y(4п/3)=2sin(4п/3+п/6)+1 =2SIN(9 П/6)+1=2 sin(3 П/2)+1=-2+1=-1