93 Videos for "identities"

Trigonometric Identities  Concept
Math › Trigonometry › Trigonometric Functions
How to use the unit circle to derive the tangent identity and the Pythagorean identity. 
Trigonometric Identities  Concept
Math › Precalculus › Trigonometric Functions
How to use the unit circle to derive the tangent identity and the Pythagorean identity. 
Using Trigonometric Identities  Problem 3
Math › Precalculus › Trigonometric Functions
How to prove an identity using a Pythagorean identity and algebra. 
Using Trigonometric Identities  Problem 3
Math › Trigonometry › Trigonometric Functions
How to prove an identity using a Pythagorean identity and algebra. 
Using Trigonometric Identities  Problem 1
Math › Trigonometry › Trigonometric Functions
How to prove an identity using a Pythagorean identity and algebra. 
Trigonometric Identities  Problem 1
Math › Precalculus › Trigonometric Functions
How to use the Pythagorean identity to find cosine and tangent when sine is known. 
Using Trigonometric Identities  Problem 1
Math › Precalculus › Trigonometric Functions
How to prove an identity using a Pythagorean identity and algebra. 
Trigonometric Identities  Problem 1
Math › Trigonometry › Trigonometric Functions
How to use the Pythagorean identity to find cosine and tangent when sine is known. 
Using Trigonometric Identities  Problem 2
Math › Trigonometry › Trigonometric Functions
How to simplify a trigonometric expression using a Pythagorean identity and algebra. 
The Identity Matrix  Concept
Math › Precalculus › Systems of Linear Equations and Matrices
How to determine the identity matrix of order n. 
Using Trigonometric Identities  Problem 2
Math › Precalculus › Trigonometric Functions
How to simplify a trigonometric expression using a Pythagorean identity and algebra. 
Using Trigonometric Identities  Concept
Math › Precalculus › Trigonometric Functions
How to simplify a trigonometric expression by converting to sines and cosines and using algebra. 
Using Trigonometric Identities  Concept
Math › Trigonometry › Trigonometric Functions
How to simplify a trigonometric expression by converting to sines and cosines and using algebra. 
Trigonometric Identities  Problem 2
Math › Trigonometry › Trigonometric Functions
How to use the unit circle to show that cosine is an even function, and sine and tangent are odd functions. 
Trigonometric Identities  Problem 2
Math › Precalculus › Trigonometric Functions
How to use the unit circle to show that cosine is an even function, and sine and tangent are odd functions. 
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. 
Using the Sine and Cosine Addition Formulas to Prove Identities  Problem 2
Math › Precalculus › Advanced Trigonometry
How to use the sine and cosine supplementary angle identities. 
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. 
Using the Sine and Cosine Addition Formulas to Prove Identities  Concept
Math › Precalculus › Advanced Trigonometry
How to use the sine and cosine addition formulas to prove the cofunction identities. 
The HalfAngle Identities  Problem 2
Math › Trigonometry › Advanced Trigonometry
How to use a halfangle formula to evaluate cos(105).