Trigonometric equations can be solved in MATLAB using the 'solve' command, which requires specific arguments. Users are encouraged to refer to the help documentation by typing "help solve" in the command window for guidance on syntax and usage. Additional help can be found for specific trigonometric functions like tangent and sine by using commands such as "help tan" and "help sin." One user discovered the 'fzero' function through a Google search, which effectively met their needs for solving trigonometric equations. The discussion highlights the importance of utilizing MATLAB's built-in help resources for problem-solving.