Show[Plot[Sin[x], {x, 0, π}, PlotStyle -> Red,
PlotRange -> {{0, 2 π}, {-1, 1}}],
Plot[Sin[x], {x, π, 2 π}, PlotStyle -> Green,
PlotRange -> {{0, 2 π}, {-1, 1}}]]
Is there a simpler way of doing this? Especially, one that does not require repeating the Plot command 2 times ;)