• #### 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 counter-clockwise.
• #### 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.