• #### The Cross Product of Vectors - Concept

##### Math›Precalculus›Systems of Linear Equations and Matrices
How to compute the cross product of two 3D vectors.
• #### Graphs of the Sine and Cosine Functions - Problem 1

##### Math›Precalculus›Trigonometric Functions
How to graph one period of y = sin q.
• #### The Sine Addition Formulas - Problem 3

How to evaluate sin(a ? b) and sin(a + b) when you know only cos(a) and sin(b).
• #### Solving Trigonometric Equations - Problem 3

How to solve a simple trig equation involving secant.
• #### The Sine Addition Formulas - Problem 3

How to evaluate sin(a ? b) and sin(a + b) when you know only cos(a) and sin(b).
• #### Using the Inverse Trigonometric Functions - Concept

How to evaluate expressions like tan(sin (4/5))^(-1).
• #### Solving Trigonometric Equations - Problem 3

How to solve a simple trig equation involving secant.
• #### 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.
• #### Using the Inverse Trigonometric Functions - Concept

How to evaluate expressions like tan(sin (4/5))^(-1).
• #### Graphs of the Sine and Cosine Functions - Problem 1

##### Math›Trigonometry›Trigonometric Functions
How to graph one period of y = sin q.
• #### Graphing the Reciprocal Trigonometric Functions - Problem 1

##### Math›Precalculus›Trigonometric Functions
How to graph y = sec q.
• #### Solving Trigonometric Equations - Problem 1

How to solve a simple cosine equation: cos x = ?2/2.
• #### Solving Trigonometric Equations - Problem 1

How to solve a simple cosine equation: cos x = ?2/2.
• #### Graphing the Reciprocal Trigonometric Functions - Problem 2

##### Math›Precalculus›Trigonometric Functions
How to graph y = csc q.
• #### Graphing the Reciprocal Trigonometric Functions - Problem 1

##### Math›Trigonometry›Trigonometric Functions
How to graph y = sec q.
• #### Graphing the Reciprocal Trigonometric Functions - Problem 2

##### Math›Trigonometry›Trigonometric Functions
How to graph y = csc q.