86 Videos for "the unit circle"

Calculating Coordinates in the Unit Circle  Concept
Math › Trigonometry › Pythagorean Theorem
How to describe the unit circle. How to draw the unit circle and label its parts. How to strategize about finding coordinates on the unit circle. 
Calculating Coordinates in the Unit Circle  Concept
Math › Geometry › Pythagorean Theorem
How to describe the unit circle. How to draw the unit circle and label its parts. How to strategize about finding coordinates on the unit circle. 
Calculating Coordinates in the Unit Circle  Problem 1
Math › Geometry › Pythagorean Theorem
How to find the coordinates on the unit circle, given an angle of 225 degrees. 
Calculating Coordinates in the Unit Circle  Problem 2
Math › Geometry › Pythagorean Theorem
How to find the coordinates on the unit circle, given an angle of 60 degrees. 
Calculating Coordinates in the Unit Circle  Problem 2
Math › Trigonometry › Pythagorean Theorem
How to find the coordinates on the unit circle, given an angle of 60 degrees. 
Calculating Coordinates in the Unit Circle  Problem 1
Math › Trigonometry › Pythagorean Theorem
How to find the coordinates on the unit circle, given an angle of 225 degrees. 
Unit Vectors  Problem 3
Math › Precalculus › Vectors and Parametric Equations
How to find a unit vector in any direction given the direction's angle. 
Parametrizing a Circle  Concept
Math › Precalculus › Vectors and Parametric Equations
How to write the parametric equations of a circle centered at (0,0) with radius r, oriented counterclockwise. 
Trigonometric Identities  Concept
Math › Precalculus › Trigonometric Functions
How to use the unit circle to derive the tangent identity and the Pythagorean identity. 
Trigonometric Identities  Concept
Math › Trigonometry › Trigonometric Functions
How to use the unit circle to derive the tangent identity and the Pythagorean identity. 
Trigonometric Identities  Problem 3
Math › Trigonometry › Trigonometric Functions
How to use the unit circle to show that sine and cosine have period 2*pi, and tangent has period pi. 
Trigonometric Identities  Problem 3
Math › Precalculus › Trigonometric Functions
How to use the unit circle to show that sine and cosine have period 2*pi, and tangent has period pi. 
The Definitions of Sine and Cosine  Concept
Math › Trigonometry › Trigonometric Functions
How we define sine and cosine for all angle measures using the unit circle. 
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. 
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. 
The Definitions of Sine and Cosine  Concept
Math › Precalculus › Trigonometric Functions
How we define sine and cosine for all angle measures using the unit circle. 
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. 
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. 
Graph of the Tangent Function  Concept
Math › Trigonometry › Trigonometric Functions
How to graph y = tan(theta) for 0 <= theta < pi/2. 
The Tangent Function  Problem 1
Math › Precalculus › Trigonometric Functions
How to find values of tan(q) when q=0, ?/6, ?/4, and ?/3.