1. The problem statement, all variables and given/known data The question asks me to find io by using mesh analysis. 2. Relevant equations KCL 3. The attempt at a solution In fact, the question also asks me to find it by superposition and I found the answer should be: i0=0.1+0.218 cos(2000t+134°)-1.18 sin(4000t+7.4°) But I don't know how to use mesh analysis to solve the circuit with independent sources of different frequency. Thanks for reading my post.