程序如下:x=linspace(0,4*pi,100);y1=sin(x);y2=cos(x);y3=sin(x)./(
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程序如下:
x=linspace(0,4*pi,100);
y1=sin(x);
y2=cos(x);
y3=sin(x)./(cos(x)+eps);
y4=cos(x)./(sin(x)+eps);
subplot(2,2,1); plot(x,y1),title('sin(x)');
subplot(2,2,2); plot(x,y2),title('cos(x)');
subplot(2,2,3); plot(x,y3),title('sin(x)/cos(x)');
subplot(2,2,4); plot(x,y4),title('cos(x)/sin(x)');
(1)对下面有关程序的功能的说法不正确的是( )
(A)绘制了三角函数sinx,cosx,tanx,cotx的图像;
(B)分割了图形窗口;
(C)用4个窗口分别显示了sinx,cosx,tanx,cotx的图像;;
(D)同时将4个图形按 绘制在同一窗口中;
(2)第四行与第5行语句中eps的功能是( )
(A)避免除法没有意义;(B)为得到精确值;
(C)分数表示; (D)小数表示.
x=linspace(0,4*pi,100);
y1=sin(x);
y2=cos(x);
y3=sin(x)./(cos(x)+eps);
y4=cos(x)./(sin(x)+eps);
subplot(2,2,1); plot(x,y1),title('sin(x)');
subplot(2,2,2); plot(x,y2),title('cos(x)');
subplot(2,2,3); plot(x,y3),title('sin(x)/cos(x)');
subplot(2,2,4); plot(x,y4),title('cos(x)/sin(x)');
(A)绘制了三角函数sinx,cosx,tanx,cotx的图像;
(B)分割了图形窗口;
(C)用4个窗口分别显示了sinx,cosx,tanx,cotx的图像;;
(D)同时将4个图形按 绘制在同一窗口中;
(2)第四行与第5行语句中eps的功能是( )
(A)避免除法没有意义;(B)为得到精确值;
(C)分数表示; (D)小数表示.
(!)D
(2)B
(2)B
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