clf,t=0:0.1:3*pi;alpha=0:0.1:3*pi;
plot(t,sin(t),'r-');hold on;plot(alpha,3*exp(-0.5*alpha),'k:');
set(gca,'fontsize',15,'fontname','times New Roman'),
xlabel('it{t(deg)}');
ylabel('\it{magnitude}');
title('\it{sine wave and {\it{Ae}}}^{-\alpha{\it t}}wave');
text(6,sin(6),'\fontsize{15}The Value \it{sin(t) at {\itt}=6\rightarrow\bullet}','HorizontalAlignment','right'),
text(2,3*exp(-0.5*2),['\fontsize{15}\bullet\leftarrow The value of \it{3e}^{-0.5 \it{t}}=',num2str(3*exp(-0.5*2)),'at \it{t}=2']);