Hi, what do you want to do?
Curated Video
Area of Oblique Triangles
A video entitled “Area of Oblique Triangles” which models how to calculate the areas of oblique triangles.
Curated Video
Solving for X in Right Triangles using the Sine Ratio
In this video, we learn about solving for X in triangles using the sine ratio. By comparing the ratios of the length of the side opposite an acute angle to the length of the hypotenuse in right triangles, we can determine the value of X....
Curated Video
Finding the Tangent of an Acute Angle in a Right Triangle
In this video, the teacher explains how to use the tangent ratio to find the height of a flying plane. By setting up an equation using the tangent of the given angle and the known distance, the teacher demonstrates how to solve for the...
Curated Video
Using Geometry to Determine the Cost and Length of Water Slides
In this video, the teacher explains how to use geometry knowledge as a water slide engineer. They demonstrate how to model a word problem by applying trigonometric ratios or the Pythagorean theorem. The lesson includes finding the cost...
Curated Video
Understanding the Cosecant Ratio in Right Triangles
In this video, the teacher explains how to find the length of a rope needed to pitch a tent using the cosecant ratio in right triangles. The teacher demonstrates the use of the sine ratio and then introduces the cosecant ratio as the...
KnowMo
Introduction to Trigonometry Functions in Right-Angle Triangles
This video is an introduction to trigonometry functions, which are used to calculate side lengths and angles in triangles using three important ratios: sine, cosine, and tangent. The video explains how to establish a right-angle triangle...
Curated OER
What is the Formula for the Area of a Triangle Using Sines?
Watch this video to discover how trigonometry can give you another way to find area of triangle. By starting with the standard formula for the area of the triangle and the right triangle trigonometric ratio for sine, the instructor...
Virtual Nerd
Virtual Nerd: How Do You Find the Sine of an Angle in a Right Triangle?
A trigonometric ratio is a ratio between two sides of a right triangle and includes the sine ratio. Discover how to find the sine of a particular angle in a right triangle by watching this video. [2:48]
Study Pug
Study Pug: Double Angle Identities
In this lesson, you will learn how to make use of the double-angle identities, a.k.a. double-angle formulas to find the sine and cosine of a double angle. It's hard to simplify complex trigonometric functions without these formulas. [6:23]
Study Pug
Study Pug: Unit Circle
In the world of calculus, pre-calculus, and trigonometry, you will often find references toward and problems regarding "the unit circle." But, oddly, we are rarely ever taught what it is! This video will change that with an in-depth...