请问如何用matlab画出cosx*cosy的二维分布图呢，x和y区间都是(-pi,pi))！很急，谢谢了！

请问如何用matlab画出cosx*cosy的二维分布图呢,x和y区间都是(-pi,pi...
[x,y]=meshgrid(-pi\/2:0.01*pi:pi\/2,-pi\/2:0.01*pi:pi\/2);z=8.39*(88.18*cos(x).*cos(y)+63.21).^0.25;surf(x,y,z)请注意最后面的那个0.25次方，也要用".*"

如何用MATLAB画出y=sinx*cosy 的图形
ezplot('y-sin(x)*cos(y)')

关于matlab使用的问题
axis([xmin xmax ymin ymax]) []中给出x轴和y轴的最小、最大值 如果要把y1=6sint,y2=6cost,y3=sint2-tcost绘制在一张图上,则可输入如下的命令：t=0:pi\/12:2*pi;y1=6*sin(t);y2=6*cos(t);y3=sin(t.^2)-t.*cos(t);plot(t,y1,'r-',t,y2,'bo',t,y3,'k:')...

matlab画极坐标图像
clear,clc clf f=@(p)@(x)[-sin(x(1))*cos(x(2))-0.6*sin(2*x(1))*cos(x(2))+0.9*...sin(x(1)+x(2)+pi\/3),cos(x(1))*cos(x(2))+0.38*cos(2*x(1))*cos(x(2))-...0.9*cos(x(1)+x(2)+pi\/3)-p];op=optimset('display','off');p=-3:.01:...

x,y的区间为(-π\/2,π\/2)证明cos((x+y)\/2)>(cosx+cosy)\/2
cos((x+y)\/2)'= -sin((y+x)\/2)\/2 x=y=-π\/2 上式子 =1\/2 (cosx+cosy)\/2'=-sin(x)\/2x=y=-π\/2 =1\/2 （dy\/dx）cos((x+y)\/2)\/(cosx+cosy)\/2）>0

如何用MATLAB求解cosx+cosy+cosz的三元方程
eq3='cos(7*x)+cos(7*y)+cos(7*z)';[x,y,z]=solve(eq1,eq2,eq3,'x','y','z')若求实数解可这样：syms x y z real eq1='cos(x)+cos(y)+cos(z)-0.6*pi';eq2='cos(5*x)+cos(5*y)+cos(5*z)';eq3='cos(7*x)+cos(7*y)+cos(7*z)';[x,y,z]=solve(eq1...

请教:如何证明|cosx-cosy|<=|x-y|?
容易。用差化积公式cosx-cosy=-2sin(x+y)\/2sin(x-y)\/2 所以左边＝2|sin(x+y)\/2|*|sin(x-y)\/2|<=2|sin(x-y)\/2|<=2|(x-y)\/2|=|x-y|

cosx+cosz=cosy sinx+sinz=siny 怎么用matlab画图,在一个图中分别是x...
cos(x)+cos(z)=cos(y) -> cos(z)=cos(y)-cos(x) -> z = acos(cos(y)-cos(x))z1 = 'acos(cos(y)-cos(x))';z2 = 'asin(sin(y)-sin(x))';ezmesh(z1);hold on;ezmesh(z2);hold off;zlabel('z');zlim([-4 4]);title([z1 ' & ' z2]);

cosx²+cosy²-cosxy取值范围
-1<= cosx^2 <=1 -1<= cosy^2 <=1 -1<= -cosyxy <1 三式相加 -1<= cosx^2+cosy^2 -cosyxy <3,cosx²+cosy²-cosxy取值范围[-3,3)

证明cos(x+y)=cosxcosy-sinxsiny?
怎么证明两角和的余弦公式Cos(x+y)=CosxCosy-SinxSiny 悬赏分：0 - 解决时间：2010-6-13 19:25 提问者： 244169321 - 三级最佳答案第一个公式的证明:右边=2*sin[(A+B)\/2]*cos[(A-B)\/2]=2*[sin(A\/2)*cos(B\/2)+cos(A\/2)sin(B\/2)]*[cos(A\/2)cos(B\/2)+sin(A\/2)sin(B...