291 Videos for "trigonometry"

Bonus Math Content
Test Prep › ACT › ACT Math
Short, helpful video on ACT Trigonometry by top ACT prep instructor, Devorah. Videos are produced by leading online education provider, Brightstorm. 
Trigonometric Equations that Require Factoring  Concept
Math › Trigonometry › Advanced Trigonometry
How to solve a sine equation by factoring: 4 [sin(theta)]^2 = 2. 
The Cosine Addition Formulas  Problem 3
Math › Trigonometry › Advanced Trigonometry
How to evaluate cos(a ? b) and cos(a + b) when you know only sin(a) and cos(b). 
Using the Inverse Trigonometric Functions  Problem 1
Math › Trigonometry › Advanced Trigonometry
How to prove an identity that involves sin^1(x) and cos^1(x). 
Other Forms of the Cosine DoubleAngle Formula  Concept
Math › Trigonometry › Advanced Trigonometry
How to derive two more cosine doubleangle formulas. 
Using the Sine and Cosine Addition Formulas to Prove Identities  Problem 2
Math › Trigonometry › Advanced Trigonometry
How to use the sine and cosine supplementary angle identities. 
Trigonometric Equations that Require Factoring  Problem 2
Math › Trigonometry › Advanced Trigonometry
How to solve a tangent equation by factoring: tan^2(x)  tan(x)  2 = 0. 
Trigonometric Equations that Require Factoring  Problem 3
Math › Trigonometry › Advanced Trigonometry
How to solve a sine and cosine equation by factoring: ?2 sin2 x ? 5 cos x + 4 = 0. 
Using the Sine and Cosine Addition Formulas to Prove Identities  Concept
Math › Trigonometry › Advanced Trigonometry
How to use the sine and cosine addition formulas to prove the cofunction identities. 
Trigonometric Equations that Require Factoring  Problem 1
Math › Trigonometry › Advanced Trigonometry
How to solve a sine equation by factoring: 2 sin2 x ? 3 sin x + 1 = 0. 
Using the Sine and Cosine Addition Formulas to Prove Identities  Problem 1
Math › Trigonometry › Advanced Trigonometry
How to use the sine and cosine addition formulas to prove the "add pi" identities. 
Other Forms of the Cosine DoubleAngle Formula  Problem 1
Math › Trigonometry › Advanced Trigonometry
How to use the cosine doubleangle formulas to derive the power reduction formulas. 
Using the Sine and Cosine Addition Formulas to Prove Identities  Problem 3
Math › Trigonometry › Advanced Trigonometry
How to use the sine and cosine addition formulas to prove a difference formula for tangent. 
Other Forms of the Cosine DoubleAngle Formula  Problem 2
Math › Trigonometry › Advanced Trigonometry
How to use the power reduction formulas to reduce cos4 x. 
Angle of Elevation and Depression  Concept
Math › Precalculus › Basic Trigonometry
How to define an angle of elevation or an angle of depression. 
Angle of Elevation and Depression  Concept
Math › Geometry › Basic Trigonometry
How to define an angle of elevation or an angle of depression. 
Trigonometric Ratios: Sine  Concept
Math › Geometry › Basic Trigonometry
How to define the sine ratio and identify the sine of an angle in a right triangle. 
The Tangent Function  Concept
Math › Trigonometry › Trigonometric Functions
How to define the tangent function for all angles. 
Trigonometric Ratios: Cosine  Problem 2
Math › Geometry › Basic Trigonometry
How to find the length of a hypotenuse in a right triangle, given a side length. 
Angle of Elevation and Depression  Problem 1
Math › Precalculus › Basic Trigonometry
How to use an angle of depression to solve a word problem with an airplane.