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514741735

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function q=myfun(p)
x=p(1);
y=p(2);
q(1)=abs((5*sin(x)+(200+5*x)*cos(x))*(5*cos(x)-(200+5*x)*sin(x))^(-1)*((200+5*x)*cos(x)-(200+5*y)*cos(y))-(200+5*x)*sin(x)+(200+5*y)*sin(y))*(((5*sin(x)+(200+5*x)*cos(x))*(5*cos(x)-(200+5*x)*sin(x))^(-1))^2+1)^(-1/2)-30;
q(2)=abs(((200+5*x)*sin(x)-5*cos(x))*(5*sin(x)+(200+5*x)*cos(x))^(-1)*((200+5*y)*cos(y)-(200+5*x)*cos(x))-(200+5*y)*sin(y)+(200+5*x)*sin(x))*((((200+5*x)*sin(x)-5*cos(x))*(5*sin(x)+(200+5*x)*cos(x))^(-1))^2+1)^(-1/2)-140;

x=fsolve('myfun',[3,4],optimset('Display','off'))

x =

   28.1992   28.6208

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514741735: ½ð±Ò+30, ¡ï¡ï¡ï¡ï¡ï×î¼Ñ´ð°¸ 2015-01-09 08:04:57
CODE:
function solve_nolin_eqs
clear all;clc
[x fval]=fsolve(@myfun,[3,4])

function q=myfun(p)
x=p(1);
y=p(2);
q(1)=abs((5*sin(x)+(200+5*x)*cos(x))*(5*cos(x)-(200+5*x)*sin(x))^(-1)*((200+5*x)*cos(x)-(200+5*y)*cos(y))-(200+5*x)*sin(x)+(200+5*y)*sin(y))*(((5*sin(x)+(200+5*x)*cos(x))*(5*cos(x)-(200+5*x)*sin(x))^(-1))^2+1)^(-1/2)-30;
q(2)=abs(((200+5*x)*sin(x)-5*cos(x))*(5*sin(x)+(200+5*x)*cos(x))^(-1)*((200+5*y)*cos(y)-(200+5*x)*cos(x))-(200+5*y)*sin(y)+(200+5*x)*sin(x))*((((200+5*x)*sin(x)-5*cos(x))*(5*sin(x)+(200+5*x)*cos(x))^(-1))^2+1)^(-1/2)-140;

x =

   28.1992   28.6208


Á½¸ö·½³Ì²Ð²î fval =

  1.0e-010 *

    0.2747   -0.1253
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514741735

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ÒýÓûØÌû:
4Â¥: Originally posted by ÔÂÖ»À¶ at 2015-01-08 21:41:28
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514741735

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ÒýÓûØÌû:
4Â¥: Originally posted by ÔÂÖ»À¶ at 2015-01-08 21:41:28
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6Â¥: Originally posted by 514741735 at 2015-01-09 08:16:13
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function solve_nolin_eqs
clear all;clc
[x fval]=fsolve(@myfun,[3,4])

function q=myfun(p)
a=5;
b=200;
x=p(1);
y=p(2);
q(1)=abs((a*sin(x)+(b+a*x......;
q(2)=abs(((b+a*x)*sin(x)-a*......;
MATLAB¡¢MSСÎÊÌâ¡¢ÆÕͨÎÊÌâÇë·¢ÌûÇóÖú£¡Ê±¼ä¾«Á¦ÓÐÏÞ£¬Ë¡²»½ÓÊÜÎÞ³¥Ë½ÐÅÇóÖú¡£
7Â¥2015-01-09 08:41:43
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514741735

Òø³æ (СÓÐÃûÆø)

ÒýÓûØÌû:
7Â¥: Originally posted by ÔÂÖ»À¶ at 2015-01-09 08:41:43
²»ÐèÒªÁгÉËÄÔª·½³Ì×é°É¡£°´ÈçϰÑa b ¶¨ÒåºÃ¼´¿É¡£
function solve_nolin_eqs
clear all;clc
=fsolve(@myfun,)

function q=myfun(p)
a=5;
b=200;
x=p(1);
y=p(2);
q(1)=abs((a*sin(x)+(b+a*x......;
...

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