Lesson: Trigonometric Ratios on the Unit Circle Mathematics • First Year of Secondary School

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In this lesson, we will learn how to relate the 𝑥- and 𝑦-coordinates of points on the unit circle to trigonometric functions.

Students will be able to

understand that the coordinates of points on the unit circle can be written in terms of and ,
evaluate , , and given a point on the unit circle that the terminal side of passes through,
understand the definitions of the reciprocal trigonometric functions,
evaluate , , and given a point on the unit circle that the terminal side of passes through.