The term 'TRIG MEASURE' refers to two trigonometric functions, SINE and SECANT. SINE is a mathematical function that describes the ratio of the side opposite a given angle in a right triangle to the hypotenuse of the triangle. It is represented by the letter 'S' in mathematics and is abbreviated as 'SIN' in trigonometry. SECANT is another trigonometric function that describes the ratio of the side adjacent to a given angle in a right triangle to the hypotenuse of the triangle. It is represented by the letter 'C' in mathematics and is abbreviated as 'SEC' in trigonometry. Both SINE and SECANT are used to measure angles in trigonometry.