• #### Unit Vectors - Concept

##### Math›Precalculus›Vectors and Parametric Equations
How to express a vector algebraically in terms of the unit vectors i and j.
• #### Unit Vectors - Problem 1

##### Math›Precalculus›Vectors and Parametric Equations
How to convert a vector into component form when it is expressed in terms of the unit vectors i and j.
• #### Unit Vectors - Problem 3

##### Math›Precalculus›Vectors and Parametric Equations
How to find a unit vector in any direction given the direction's angle.
• #### Unit Vectors - Problem 2

##### Math›Precalculus›Vectors and Parametric Equations
How to find the unit vector that has the same direction as a given vector.
• #### The Cross Product of Vectors - Concept

##### Math›Precalculus›Systems of Linear Equations and Matrices
How to compute the cross product of two 3D vectors.
• #### The Cross Product of Vectors - Problem 2

##### Math›Precalculus›Systems of Linear Equations and Matrices
How to show that the cross product of vectors u and v is perpendicular to both u and v.
• #### The Cross Product of Vectors - Problem 3

##### Math›Precalculus›Systems of Linear Equations and Matrices
How to find the equation of a plane that contains three given points.
• #### The Cross Product of Vectors - Problem 1

##### Math›Precalculus›Systems of Linear Equations and Matrices
How to show that when you reverse the order of a cross product, you get the opposite result.
• #### 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.