matlab Error using ==> solve is not a valid expression or eq

来源：学生作业帮编辑：百度作业网作业帮分类：综合作业时间：2024/06/25 16:53:33

matlab Error using ==> solve is not a valid expression or equation.
syms x l r n b k
f1=('cos(pi/2-l/bn)=(r.^2+(x+sqrt(k.^2-r.^2)).^2-k.^2)/(2*r*(x+sqrt(k.^2-r.^2)))');
[a]=solve(f1)
Error using ==> solve
' cos(pi/2-l/bn)=(r.^2+(x+sqrt(k.^2-r.^2)).^2-k.^2)/(2*r*(x+sqrt(k.^2-r.^2))) ' is not a valid expression or equation.

童鞋你好,请用如下程序：
syms x l r n b k
f1=cos(pi/2-l/(b*n))-(r.^2+(x+sqrt(k.^2-r.^2)).^2-k.^2)/(2*r*(x+sqrt(k.^2-r.^2)));
[a]=solve(f1==0)
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希望对你有帮助,满意请采纳,有问题请追问, (^_^)谢谢
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