% plot cos(x) and sin(x) over 0 < x < 2pi
x = linspace(0, 2*pi, 100);
plot(x, cos(x), 'b-', x, sin(x), 'r-');
xlabel('x');
legend('cos x', 'sin x');
title('two trig functions')
grid on
axis equal
axis([0 2*pi -1 1])