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. 
Other Forms of the Cosine DoubleAngle Formula  Concept
Math › Trigonometry › Advanced Trigonometry
How to derive two more cosine doubleangle formulas. 
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 Sine to Calculate the Area of a Triangle  Problem 2
Math › Trigonometry › Basic Trigonometry
How to calculate the area of a regular inscribed polygon given only the radius of a circle. 
Using the Inverse Trigonometric Functions  Problem 1
Math › Trigonometry › Advanced Trigonometry
How to prove an identity that involves sin1 x and cos1 x. 
Trigonometric Equations that Require Factoring  Concept
Math › Trigonometry › Advanced Trigonometry
How to solve a sine equation by factoring: 4 [sin(theta)]^2 = 2. 
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 3
Math › Trigonometry › Advanced Trigonometry
How to solve a sine and cosine equation by factoring: ?2 sin2 x ? 5 cos x + 4 = 0. 
Other Forms of the Cosine DoubleAngle Formula  Problem 2
Math › Trigonometry › Advanced Trigonometry
How to use the power reduction formulas to reduce cos4 x. 
Trigonometric Equations that Require Factoring  Problem 2
Math › Trigonometry › Advanced Trigonometry
How to solve a tangent equation by factoring: tan2 x  tan x ? 2 = 0. 
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 1
Math › Trigonometry › Advanced Trigonometry
How to use the cosine doubleangle formulas to derive the power reduction formulas. 
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. 
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. 
Angle of Elevation and Depression  Problem 1
Math › Geometry › Basic Trigonometry
How to use an angle of depression to solve a word problem with an airplane. 
Angle of Elevation and Depression  Concept
Math › Geometry › Basic Trigonometry
How to define an angle of elevation or an angle of depression. 
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. 
Trigonometric Ratios: Cosine  Concept
Math › Geometry › Basic Trigonometry
How to define the cosine ratio and identify the cosine of an angle in a right triangle. 
Inverse Trigonometric Functions  Concept
Math › Geometry › Basic Trigonometry
How to use inverse trig functions to find angles in right triangles.