Trigonometry Part 1
Gr 10

The Grade 10 Trigonometry Part 1 module introduces learners to the foundational concepts of trigonometry by exploring the relationships between the sides of a right-angled triangle. This chapter helps students understand how trigonometric ratios are defined and how they are used to solve a wide range of geometric and real-life problems.

Learners begin by identifying the hypotenuse, opposite, and adjacent sides, and then use these to define the three primary trigonometric ratios: sine, cosine, and tangent. The lessons cover calculating unknown sides and angles, using trigonometric tables or calculators, and applying trigonometry in practical contexts such as heights, distances, and angles of elevation or depression. Clear examples guide learners through each step, ensuring they develop confidence in selecting and applying the correct ratio.

By the end of this module, students will be able to model and solve right-triangle problems accurately, interpret real-world trigonometric scenarios, and apply trigonometric ratios effectively—establishing the essential groundwork needed for further trigonometry in Grades 11 and 12.