How can I do two variable for loop using vector elements with their index positions

Hi, Im new using matlab and i want to use a "for loop" to solve an equation but i need to use elements from vector to solve it and get the diferent answers. i have two vectors with the same lenght i want know the answer for any position equals to another. for example i need the element of the position 1 from vector Theta_1 and vector X, to know the value of m1. but using this kind of double loop i have a problem i dont now hot to access to an element from the vector, i guees that using an "if" for separate the relevant information [Theta_1pos(i)==Xpos(i)] from the useless. I have two mainly questions, first How can i use the element from a index postion to calculate the answer that i need? my second question is How can i store all the answers in a vector without using the function "disp()".?

%%Vectores iniciales
X=0.050:0.050:0.350;
T1=[45.5 38.0 32.4 28.7 26.2 24.9 24.1];
%%Constantes[1]
Tinf=18.8;
Tb=55.7;
Theta_b=Tb-Tinf;
%%Vector theta
Theta_1=T1-Tinf;
for k= element pos(Theta_1): lenght(Theta_1)
    for xpos one to lenght 
         syms m
           eqn = (cosh(m*(L-x))/cosh(m*L))==(k);
             solm = solve(eqn,m)
             if (kpostion==xposition)
           disp(solm)
          end 
       end
    end