f_5

function out = f_5(theta)
format long;
L1 = 3;
L2 = 3*sqrt(2);
L3 = 3;

gamma = pi/4;
%theta = 2.515984235615659

x1 = 5;
x2 = 0;
y2 = 6;

p1 = 5;
p2 = 7.02;
p3 = 3;

A2 = L3.*cos(theta)-x1;
B2 = L3.*sin(theta);
A3 = L2.*((cos(theta).*cos(gamma))-(sin(theta).*sin(gamma)))-x2;
B3 = L2.*((cos(theta).*sin(gamma))+(sin(theta).*cos(gamma)))-y2;


N1 = B3.*(p2.^2-p1.^2-A2.^2-B2.^2)-(B2.*(p3.^2-p1.^2-A3.^2-B3.^2));
N2 = (-A3).*(p2.^2-p1.^2-A2.^2-B2.^2)+(A2.*(p3.^2-p1.^2-A3.^2-B3.^2));
D = 2.*((A2.*B3)-(B2.*A3));

x = N1./D;
y = N2./D;
%u1 = x+(L2*cos(theta+gamma))
%v1 = y+(L2*sin(theta+gamma))
%u2 = x+(L3*cos(theta))
%v2 = y+(L3*sin(theta))

out = N1.^2+N2.^2-p1.^2.*D.^2;

end

Not enough input arguments.

Error in f_5 (line 18)
A2 = L3.*cos(theta)-x1;