FuseSchool
SOHCAHTOA - Finding Missing Sides Part 1
Explore the meaning and application of the three trigonometric ratios. A thorough video reviews the trig ratios and then shows how to apply them in triangle problems. The instructor demonstrates several examples finding both side and...
FuseSchool
Introducing the Sine Ratio
Sign on to learn about sine. Scholars view a video that explains the sine ratio. It shows how the ratio changes depending on the angle in question.
FuseSchool
Decoding Basic Trigonometric Ratios
Demonstrate the calculator keystrokes necessary for finding a measure of an angle using trigonometry. A straight forward lesson explains how to calculate an angle measure given a sine, cosine, or tangent ratio. The narrator discusses...
Curated OER
How Do You Solve a Problem Using an Angle of Elevation?
One given angle and one given length equals an unknown height. What? Here's a word problem that can be solved given two pieces of information by using the correct formula. Watch the instructor explain how to use the tangent ratio formula...
Curated OER
How Do You Find a Missing Side of a Right Triangle Using Cosine?
Trigonometry? What's trigonometry. Well, something to do with triangles, right? Right! Right triangles! In this problem, find the missing length of one of the sides. So set this up as a ratio: cosine(A) = adjacent side length divided by...
Curated OER
The unit circle definition of trigonometric function
In this video, Sal shows how the sine and cosine of an angle are defined on the unit circle. He inscribes a 30-60-90 triangle in the unit circle and explains how one can use SOH-CAH-TOA to find the coordinates on the circle.
3Blue1Brown
Derivative Formulas Through Geometry | Essence of Calculus, Chapter 3
Geometry to the rescue. By watching a video, scholars see how geometric concepts help explain derivative formulas: areas of rectangles and volumes of rectangular prisms for the Power Rule and similarity and trig ratios for the Sine Rule.
FuseSchool
SOHCAHTOA - Finding Missing Sides Part 2
Explore some right triangle trigonometry with a straightforward video lesson. The instructor presents problems requiring scholars to use trig ratios to find unknown side measures. She provides worked-out solutions for those needing...
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...
Curated OER
How Do You Find a Missing Side of a Right Triangle Using Tangent?
Identify the variables, identify the given values and use a formula to find the missing length in this right triangle problem. What formula? The tangent ratio, which is normally used to show a ratio between two sides of a right triangle,...
FuseSchool
Introduction to SOHCAHTOA
You might not be able to pronounce it, but everyone remembers SOHCAHTOA. Young mathematicians learn a way to remember the three major trigonometric ratios. They see how the first letters of certain words lead to the mnemonic.
FuseSchool
Introduction to SOHCAHTOA
Explore right triangle trigonometry with a thorough video lesson. The lesson instructor introduces the trigonometric ratios with an examination of right triangle sides and angles. She continues with practice writing the ratios using...
Corbett Maths
Trigonometry Introduction
Don't go off on a tangent. An instructive video describes how to find the sine, cosine, and tangent ratios of an angle in a right angle. It describes how to label the sides of a right triangle and how to use mnemonics to remember the...
FuseSchool
Area of a Triangle 1/2absinC Proof
Demonstrate the derivation of the trigonometric area formula for a triangle. Using the base/height formula and the sine ratio, the lesson instructor demonstrates how to combine the two and create the formula A = 1/2absinC. The video...
Khan Academy
Proof: Law of Sines
In this video, Sal proves the Law of Sines by using the SOH-CAH-TOA model and setting up equivalent ratios.
Curated OER
Tau vs. PI
What�s wrong with Pi? In this video, Sal considers the question whether the number Tau (_), is a better number to use in our trigonometric model then the traditional PI (�). First, Sal reviews the definition of Pi, the trigonometric...
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