In this lesson we are going to go over the trigonometric ratios in right triangles. We will go over the most common trig ratios, we'll learn how they are defined, and how we can use them. We will solve problems involving these trig ratios using calculator. Besides these, you'll learn what are the inverse trig functions. It is important to understand when to use the first ones and when to use the second ones. By definition, the sine is always opposite leg over the hypotenuse, while the cosine is the adjacent leg over the hypotenuse. You'll learn a useful mnemonic called SOHCAHTOA to help you memorize these.
*These practice questions are only helpful when you work on them offline on a piece of paper and then use the solution steps function to check your answer.
Ratios in Right Triangles
Lecture Slides are screen-captured images of important points in the lecture. Students can download and print out these lecture slide images to do practice problems as well as take notes while watching the lecture.