Using the solve function for a more complex variable

Hello,

the equations are as follows

i am trying to find cos2 (noted by c2) and sin2 (noted by s2), this is very simple if i did it via hand, but i am trying to solve this using matlab coding and i require some help as i cant seem to get the right answer using the solve function.

solution:

[darova]

What about solve?

Answer 1

[Devineni Aslesha]

Hi Noel,

Use the solve function to find the solution for the above equations as shown below.

syms x y z s1 s2 c1 c2
eqn1 = x + s1*c2 == 0;
eqn2 = y - s1*s2 == 0;
eqn3 = z - c1 == 0;
eqns = [eqn1 eqn2 eqn3];
sol = solve(eqns,[c2 s2 z]);

Here, sol.c2, sol.s2 and sol.z are the required solutions

For more information, refer the following link

https://www.mathworks.com/help/symbolic/solve.html

[Noel Loh]

thank you so much! that worked perfectly as i wanted it to go

[madhan ravi]

Noel next time please show some efforts and don’t expect others to write the code for you.

[Noel Loh]

thanks for your help mvp, i have spent weeks trying to solve it despite not being great at coding, finally solved it a few days ago, only to be recently reminded about the topic when an actual helpful person today helped give input on a possible solution, decided to thank the person's efforts without being rude, but also hear a supposingly mvp suddenly came in throwing an useless comment just to massage his tiny ego, but your comment helped i guess, good job.