y=cos x y=arccos 0<x<兀 1≤x<1 08 15 25 -0.5 0.8 plot(cos(x),x=0.Pi,y -0.5 1..l, scaling=constrained, color=bl ue, thickness=3) lot([cos(x),x,x=0. Pi], scaling-sconr, 2004October, 2004 y x = cos 0  x  plot([cos(x),x,x=0..Pi],scaling=con strained,color=blue,thickness=4); plot(cos(x),x=0..Pi,y=- 1..1,scaling=constrained,color=bl ue,thickness=3); y x = arccos −   1 1 x