Proving The General Solution Of Cos X Cos Y

graph TB A[Proving the general solution of cos x = cos y] A --> B[Step 1: Understand the Problem] A --> C[Step 2: Identify Knowns and Unknowns] A --> D[Step 3: Formulate a Plan] A --> E[Step 4: Execute the Plan] A --> F[Step 5: Verify the Solution] B --> G[Define cos x and cos y] C --> H[Identify the variables] D --> I[Formulate a mathematical model] E --> J[Execute the mathematical model] F --> K[Verify the solution against the original problem]