Contributed to the sympy/sympy repository by developing enhancements for LaTeX trigonometric function parsing, aimed at improving the accuracy of interpreting trigonometric expressions written in LaTeX. Focused on feature development, the work involved implementing robust parsing logic and introducing targeted tests to validate the new behavior and prevent regressions. Leveraged expertise in Python, symbolic computation, and test-driven development to ensure the enhancements integrated smoothly with existing code. The improvements addressed the need for more reliable mathematical expression handling within SymPy, supporting user productivity and mathematical correctness without introducing new bug fixes during the period of contribution.