Reimagining Applied Trigonometry: Moving from Classical Ideas to Modern Tools

This study introduces an innovative method of practical trigonometry by associating the theoretical ideas with the real-world measurement techniques and contemporary instruments. It challenges the traditional compartmentalization of trigonometry as an abstract field, arguing that such isolation limits its effective potential in branches such as civil engineering, architecture, geology, astronomy, and navigation. The research critically evaluates the use of modern equipment such as digital theodolite, Arduino-based sensor, and mobile measure applications in solving trigonometric problems associated with height, distance, and spatial analysis. In addition, it revisits the historical measurement system to propose an integrated educational structure that combines conventional methods with modern technology. This hybrid model promotes experimental education, inter-subject connection, and technical literacy. Emphasizing hand-pen experimentation and inter-subject cooperation, the research wants to revive trigonometry education, which makes it more attractive, applicable and prepare for the future for students and professionals.