Worked on the erlang/otp repository to improve the accuracy and clarity of the arc sine function’s documentation, specifically for math:asin/1. Addressed a documentation bug by aligning the described API semantics with the actual function behavior, reducing the risk of developer confusion and misusage. Utilized Erlang and Git to ensure precise, traceable changes and adhered to rigorous documentation standards throughout the process. This work enhanced the overall quality and reliability of the OTP documentation, supporting better onboarding for new contributors and more dependable reference material for the Erlang community. Demonstrated strong attention to detail and domain knowledge of Erlang/OTP math APIs.