第1个回答 2017-08-21
clear all;clc;
t=0:pi/40:8*pi;
y1=sin(t);
y2=cos(t);
plot(t,y1,t,y2,'r');hold on;
x=pi/4:pi:29*pi/4;
for ii=1:length(x)
y(ii)=(-1)^(ii-1)*sqrt(2)/2;
end
plot(x,y,'kp','Markersize',10);
axis([t(1),t(end),-1.1,1.1]);
第2个回答 推荐于2017-08-24
>> x=linspace(0,8*pi,257);
>> y1=sin(x);
>> y2=cos(x);
>> p=find(abs(sin(x)-cos(x))<1e-5);
>> figure;
>> plot(x,y1,x,y2);
>> hold on;
>> plot(x(p),y1(p),'p')本回答被网友采纳
第3个回答 2013-04-17
clear all;clc;
t=0:pi/40:8*pi;
y1=sin(t);
y2=cos(t);
plot(t,y1,t,y2,'r');hold on;
x=pi/4:pi:29*pi/4;
for ii=1:length(x)
y(ii)=(-1)^(ii-1)*sqrt(2)/2;
end
plot(x,y,'kp','Markersize',10);
axis([t(1),t(end),-1.1,1.1]);