# How to find symbolic solution for theta1?

3 views (last 30 days)
safi58 on 10 Apr 2017
Commented: Manuela Gräfe on 24 Apr 2017
clc
clear all
syms m_c_theta1 m_c0 M theta1 j_L0 j_L_theta1 l j_Lm_gama
syms m_c_theta2 theta2 j_L_theta2 m_c_gama k1 gama j_L_gama j_Lm0 j_Lm_theta1 j_Lm_theta2 fi
% k1=0.423;
% F=0.95;
% gama=pi/F;
% theta2=10,
% l=0.218;
% M=0.7;
eqn1=m_c_theta1==(m_c0-1/M-1)*cos(theta1)+j_L0*sin(theta1)+1/M+1;
eqn2=j_L_theta1==(-m_c0+1/M+1)*sin(theta1)+j_L0*cos(theta1);
%eqn3=m_m_theta1==1;
%eqn3=j_Lm_theta1==j_Lm0-l*theta1;
Hi all,
Can anyone help of finding a solution specially theta1 because I found others except theta1?
Manuela Gräfe on 24 Apr 2017
Hello umme mumtahina,
please send me an personal message. I am also interested in the solutions of your questions.
Sometimes you just write: "Got it!", but you don't give the final solution. Due to the fact, that this is a public community, you should provide the corresponding answers to your questions.
So please send me ASAP a personal message.

Walter Roberson on 10 Apr 2017
No.
If you solve the first 5 equations for m_c0, j_L0, m_c_theta1, j_L_theta2, m_c_theta2 and substitute that into the 6th equation, then the right hand side will equal the left hand side.
In other words you only have 5 independent equations, not 6.
Manuela Gräfe on 24 Apr 2017
Hello umme mumtahina,
please send me an personal message. I am also interested in the solutions of your questions.
Sometimes you just write: "Got it!", but you don't give the final solution. Due to the fact, that this is a public community, you should provide the corresponding answers to your questions.
So please send me ASAP a personal message.

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