• #### Distance Formula - Problem 2

##### Math›Trigonometry›Pythagorean Theorem
How to identify a polygon (a triangle in this problem) as isosceles, equilateral, or scalene using the distance formula.
• #### The Definitions of Sine and Cosine - Problem 1

##### Math›Trigonometry›Trigonometric Functions
How to evaluate sine and cosine when the angle is 0, pi/2, pi, 3*pi/2.
• #### The Definitions of Sine and Cosine - Problem 4

##### Math›Trigonometry›Trigonometric Functions
How to determine the magnitude of sine or cosine using a unit circle diagram.
• #### Radian Measure of Angles - Problem 3

##### Math›Trigonometry›Trigonometric Functions
How to convert to radians when degrees are given and vice versa.
• #### The Definitions of Sine and Cosine - Problem 3

##### Math›Trigonometry›Trigonometric Functions
How to determine whether sine and cosine are positive or negative when we know the quadrant.
• #### Find an Equation for the Sine or Cosine Wave - Concept

##### Math›Trigonometry›Trigonometric Functions
How to identify the graph of a stretched cosine curve.
• #### Square Root Operations - Problem 3

##### Math›Trigonometry›Pythagorean Theorem
How to rationalize a fraction with a square root in the denominator.
• #### Transforming the Graphs of Sine and Cosine - Problem 3

##### Math›Trigonometry›Trigonometric Functions
How to graph a stretched cosine function with an integer period.
• #### More Transformations of Sine and Cosine - Problem 2

##### Math›Trigonometry›Trigonometric Functions
How to graph a stretched and shifted cosine function.
• #### Graphs of the Sine and Cosine Functions - Problem 1

##### Math›Trigonometry›Trigonometric Functions
How to graph one period of y = sin q.
• #### Intercepts and Asymptotes of Tangent Functions - Problem 1

##### Math›Trigonometry›Trigonometric Functions
How to find the zeros and vertical asymptotes of y = -2 tan(5x).
• #### 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.
• #### Transforming the Tangent Graph - Problem 1

##### Math›Trigonometry›Trigonometric Functions
How to graph y = 3 tan(x/4).
• #### Transforming the Tangent Graph - Problem 2

##### Math›Trigonometry›Trigonometric Functions
How to graph y = -1/2 tan(?x).
• #### Transforming the Tangent Graph - Problem 3

##### Math›Trigonometry›Trigonometric Functions
How to graph y = -0.2 tan(2x - pi/4).
• #### Square Root Operations - Problem 2

##### Math›Trigonometry›Pythagorean Theorem
How to multiply terms with square roots.
• #### Intercepts and Asymptotes of Tangent Functions - Problem 2

##### Math›Trigonometry›Trigonometric Functions
How to find the zeros and vertical asymptotes of y = 1/3 tan(?x/2).
• #### Intercepts and Asymptotes of Tangent Functions - Problem 3

##### Math›Trigonometry›Trigonometric Functions
How to find the zeros and vertical asymptotes of y = 6 tan(x/2 + pi/2).
• #### 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 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.