93 Videos for "identities"

The HalfAngle Identities  Problem 2
Math › Precalculus › Advanced Trigonometry
How to use a halfangle formula to evaluate cos(105). 
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. 
Using the Sine and Cosine Addition Formulas to Prove Identities  Problem 1
Math › Precalculus › Advanced Trigonometry
How to use the sine and cosine addition formulas to prove the "add pi" identities. 
The HalfAngle Identities  Problem 1
Math › Precalculus › Advanced Trigonometry
How to use a halfangle formula to evaluate sin(/8). 
The HalfAngle Identities  Problem 1
Math › Trigonometry › Advanced Trigonometry
How to use a halfangle formula to evaluate sin(/8). 
Trigonometric Identities  Problem 3
Math › Trigonometry › Trigonometric Functions
How to use the unit circle to show that sine and cosine have period 2?, and tangent has period ?. 
The HalfAngle Identities  Concept
Math › Trigonometry › Advanced Trigonometry
How to use the power reduction formulas to derive the halfangle formulas. 
Trigonometric Identities  Problem 3
Math › Precalculus › Trigonometric Functions
How to use the unit circle to show that sine and cosine have period 2?, and tangent has period ?. 
The HalfAngle Identities  Concept
Math › Precalculus › Advanced Trigonometry
How to use the power reduction formulas to derive the halfangle formulas. 
The HalfAngle Identities  Problem 3
Math › Trigonometry › Advanced Trigonometry
How to use the doubleangle formulas for sine and cosine to derive a halfangle formula for tangent. 
The HalfAngle Identities  Problem 3
Math › Precalculus › Advanced Trigonometry
How to use the doubleangle formulas for sine and cosine to derive a halfangle formula for tangent. 
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. 
Using the Sine and Cosine Addition Formulas to Prove Identities  Problem 3
Math › Precalculus › Advanced Trigonometry
How to use the sine and cosine addition formulas to prove a difference formula for tangent. 
The Reciprocal Trigonometric Functions  Concept
Math › Precalculus › Trigonometric Functions
How to define the reciprocal trigonometric functions, the reciprocal identities, and the Pythagorean identities. 
The Reciprocal Trigonometric Functions  Concept
Math › Trigonometry › Trigonometric Functions
How to define the reciprocal trigonometric functions, the reciprocal identities, and the Pythagorean identities. 
Graphing the Reciprocal Trigonometric Functions  Concept
Math › Precalculus › Trigonometric Functions
How to use the unit circle to derive identities that are useful in graphing the reciprocal trigonometric functions. 
Graphing the Reciprocal Trigonometric Functions  Concept
Math › Trigonometry › Trigonometric Functions
How to use the unit circle to derive identities that are useful in graphing the reciprocal trigonometric functions. 
Using the Inverse Trigonometric Functions  Problem 1
Math › Precalculus › Advanced Trigonometry
How to prove an identity that involves sin1 x and cos1 x. 
Using the Inverse Trigonometric Functions  Problem 1
Math › Trigonometry › Advanced Trigonometry
How to prove an identity that involves sin1 x and cos1 x. 
The Inverse Cosine Function  Problem 2
Math › Trigonometry › Advanced Trigonometry
How to use apply the inverse identities for cosine.