The purpose of this application is to provide the 2nd grader of the second grade, a reinforcement of trigonometry content. This program comprises a study of trigonometric ratios in a triangle rectangle, trigonometric ratios any triangle, trigonometry in the circumference and trigonometric cycle. It was used in the development of the program, a microcomputer of the Prologic line, 64 kb, 16 bits, Language BASIC
