2. uses GraphABC;
begin
Pie(100, 50, 70, 270, 360);
end.
3. uses GraphABC;
begin
Draw(x -> 2 * cos(x), -pi, pi);
end.
4. uses GraphABC;
begin
Draw(x -> cos(x), -10, 10);
Draw(x -> sin(x), -8, 8);
end.
5. uses GraphABC;
begin
Brush.Color := clRandom;
Pie(200, 200, 100, 0, 170);
Brush.Color := clRandom;
Pie(200, 200, 100, 170, 270);
Brush.Color := clRandom;
Pie(200, 200, 100, 270, 300);
Brush.Color := clRandom;
Pie(200, 200, 100, 300, 330);
Brush.Color := clRandom;
Pie(200, 200, 100, 320, 333);
Brush.Color := clRandom;
Pie(200, 200, 100, 333, 360);
end.
С цветами, думаю, сам разберешься