📐 Part 1 of Trigonometric Ratios | SOH-CAH-TOA & Using Scientific Calculator

In this lesson, we explore the six trigonometric ratios—sine, cosine, tangent, cosecant, secant, and cotangent—and learn how they are defined using the sides of a right-angled triangle. We’ll begin by identifying the opposite, adjacent, and hypotenuse sides relative to a given angle, then use the SOHCAHTOA mnemonic to understand the relationships among the sides. You’ll also learn how to use inverse trigonometric functions to determine an unknown angle when the side lengths of a right triangle are known. The lesson connects trigonometry to real-life objects and figures that form right triangles, such as a kite, ramp, and tree, and demonstrates how trigonometric ratios can be used to solve practical problems involving heights, distances, and angles. By the end of Part 1, learners will be able to: ✅ Define the six trigonometric ratios (sine, cosine, tangent, cosecant, secant, and cotangent) in terms of the sides of a right triangle. ✅ Illustrate trigonometric ratios using real-life objects or figures that form right triangles. ✅ Apply trigonometric ratios to solve practical problems involving right triangles. ✅ Determine an unknown angle using inverse trigonometric functions. Happy learning!