>>theta = 0:.01:2.*pi;

>>z = exp(i*theta);

>>figure; plot(theta, abs(exp(z)));

>>figure; plot(theta, angle(exp(z)));

>>figure; plot(theta, abs(sqrt(z)));

>>figure; plot(theta, angle(sqrt(z)));

>>figure; plot(theta, abs(sin(z)));

>>figure; plot(theta, angle(sin(z)));

