• #### Vector Direction

##### Science›Physics›Linear and Projectile Motion
How to predict the direction of a vector.
• #### 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 Vector Equation of a Line - Concept

##### Math›Precalculus›Vectors and Parametric Equations
How to write the vector equation of a line.
• #### Unit Vectors - Problem 3

##### Math›Precalculus›Vectors and Parametric Equations
How to find a unit vector in any direction given the direction's angle.
• #### The Vector Equation of a Line - Problem 3

##### Math›Precalculus›Vectors and Parametric Equations
How to write the vector equation of a line segment given its endpoints.
• #### The Vector Equation of a Line - Problem 2

##### Math›Precalculus›Vectors and Parametric Equations
How to write the vector equation of a line given two points on the line.
• #### The Vector Equation of a Line - Problem 1

##### Math›Precalculus›Vectors and Parametric Equations
How to write the vector equation of a line given its slope and one point on the line.
• #### The Geometric Representation of Vectors - Concept

##### Math›Precalculus›Vectors and Parametric Equations
How to understand what vectors are, and how they can be represented geometrically.
• #### Components of Vectors

##### Science›Physics›Linear and Projectile Motion
Understanding the components of vectors.
• #### Vector Quantities - Scalar Quantities

##### Science›Physics›Linear and Projectile Motion
Understanding the differences between vectors and scalar quantities.
• #### Lines in 3D - Concept

##### Math›Precalculus›Vectors and Parametric Equations
How to find the vector and parametric equations of a line when given two points on the line.
• #### Lines in 3D - Problem 3

##### Math›Precalculus›Vectors and Parametric Equations
How to find the point where a line passes through the xy-plane given the vector equation of the line.
• #### Lines in 3D - Problem 1

##### Math›Precalculus›Vectors and Parametric Equations
How to find the vector equation, the parametric equations, and the symmetric equation of a line given two points on the line.
• #### The Resultant of Two Forces - Concept

##### Math›Precalculus›Vectors and Parametric Equations
How to find the resultant of two forces when they are parallel, opposite, or perpendicular in direction.
• #### Navigation Problems - Concept

##### Math›Precalculus›Vectors and Parametric Equations
How we measure airspeed, wind, groundspeed, and other variables in navigation.
• #### Navigation Problems - Problem 3

##### Math›Precalculus›Vectors and Parametric Equations
How we find the course and groundspeed of an airplane when we are given its velocity and the wind velocity.
• #### Navigation Problems - Problem 2

##### Math›Precalculus›Vectors and Parametric Equations
How we find the course and groundspeed of a complicated airplane problem when we are given its velocity and the wind velocity at 210 and 270 degrees.
• #### Navigation Problems - Problem 1

##### Math›Precalculus›Vectors and Parametric Equations
How we find the course and groundspeed of an airplane when we are given its velocity and the wind velocity.
• #### Parametrizing a Line Segment - Problem 3

##### Math›Precalculus›Vectors and Parametric Equations
How to find a parametrization of segment AB that uses s, the distance from point A, as a parameter.
• #### Perpendicular, Parallel and Skew Lines in Space - Problem 1

##### Math›Precalculus›Vectors and Parametric Equations
How to find the equation of a line parallel to and perpendicular to a given line in space.