• #### Simplifying Radical Expressions - Problem 7

Simplifying radicals in the Pythagorean Theorem.
Tags:
• #### Simplifying Radical Expressions - Problem 3

Simplifying radicals in the context of using the Pythagorean Theorem to find a missing side length of a right triangle.
Tags:
• #### The Reciprocal Trigonometric Functions - Problem 2

##### Math›Trigonometry›Trigonometric Functions
How to compute all six trigonometric functions at q = -7?/6.
• #### The Reciprocal Trigonometric Functions - Problem 2

##### Math›Precalculus›Trigonometric Functions
How to compute all six trigonometric functions at q = -7?/6.
• #### Solving Quadratic Equations by Factoring - Problem 12

How to solve geometric relationships using area models, the Pythagorean Theorem, and factoring.
Tags:
• #### Solving Quadratic Equations by Factoring - Problem 21

Pythagorean Theorem problems that involve squaring and factoring binomials
Tags:
• #### The Reciprocal Trigonometric Functions - Problem 3

##### Math›Precalculus›Trigonometric Functions
How to compute all six trigonometric functions at q given sec q.
• #### The Reciprocal Trigonometric Functions - Problem 3

##### Math›Trigonometry›Trigonometric Functions
How to compute all six trigonometric functions at q given sec q.
• #### Solving Quadratic Equations by Factoring - Problem 21

##### Math›Algebra 2›Quadratic Equations and Inequalities
Pythagorean Theorem problems that involve squaring and factoring binomials
Tags:
• #### 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.
• #### Chords and a Circle's Center - Problem 3

##### Math›Geometry›Circles
How to find the radius of a circle when the length of a chord and its distance to the center of the circle is given.
• #### Solving Quadratic Equations by Factoring - Problem 12

##### Math›Algebra 2›Quadratic Equations and Inequalities
How to solve geometric relationships using area models, the Pythagorean Theorem, and factoring.
Tags:
• #### Other Forms of the Cosine Double-Angle Formula - Concept

How to derive two more cosine double-angle formulas.
• #### Other Forms of the Cosine Double-Angle Formula - Concept

How to derive two more cosine double-angle formulas.

• #### Introduction to Polar Coordinates - Concept

##### Math›Precalculus›Polar Coordinates and Complex Numbers
How to describe a point's location with polar coordinates, and how to convert from polar coordinates to rectangular coordinates.
• #### Converting from Rectangular Coordinates to Polar - Concept

##### Math›Precalculus›Polar Coordinates and Complex Numbers
How to convert the rectangular coordinates of a point into polar coordinates.
• #### 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.
• #### Converting from Polar Coordinates to Rectangular - Concept

##### Math›Precalculus›Polar Coordinates and Complex Numbers
How to convert a polar equation into rectangular form.
• #### Converting from Rectangular Coordinates to Polar - Problem 2

##### Math›Precalculus›Polar Coordinates and Complex Numbers
How to convert a rectangular equation into polar form.