<P ><FONT face="Times New Roman">dF/d</FONT>θ<FONT face="Times New Roman">=2</FONT><A><FONT face="Times New Roman">F<SUB>d</SUB></FONT></A><FONT face="Times New Roman">(sin</FONT>θ+a)cosθ+F<SUB><FONT face="Times New Roman">m</FONT></SUB>sinθ=0<p></p></P>
<P ><FONT face="Times New Roman">F<SUB>d</SUB>=117.6<p></p></FONT></P>
<P >F<FONT face="Times New Roman"><SUB>m</SUB>=637<p></p></FONT></P>
<P ><FONT face="Times New Roman">a=3.86<BR><p></p></FONT></P>
<P>求<FONT face="Times New Roman">sin</FONT>θ和cosθ<BR>答案是<FONT face="Times New Roman">sin</FONT>θ=0.88 cosθ=-0.475<BR>但是我用matlab则么也求不出,都发散了<BR>跪求各位大侠,用matlab算算<BR>如果成功了,请把程序贴上来,<BR>兄弟谢了!!!!<BR></P>