• #### The Sine Addition Formulas - Problem 1

How to use the sine of a sum formula to simplify an expression or to find the sine of an angle.
• #### The Sine Addition Formulas - Problem 1

How to use the sine of a sum formula to simplify an expression or to find the sine of an angle.
• #### Exterior Angles of a Polygon - Concept

##### Math›Geometry›Polygons
How to find the sum of the exterior angles in a polygon and find the measure of one exterior angle in an equiangular polygon.
• #### Solving a Rational Equation - Problem 5

##### Math›Algebra 2›Rational Expressions and Functions
Turning sums and differences into proportions to enable cross multiplication.
• #### The Cosine Addition Formulas - Problem 2

How to derive the cosine of a sum formula and use it to find the cosine of an angle.
• #### Simplifying Expressions with Exponents - Problem 4

##### Math›Algebra›Exponents
Overview of when exponents can be "distributed," or applied to products or quotients, and how exponents can not be applied to sums or differences.
• #### Simplifying Complex Fractions - Problem 6

##### Math›Algebra 2›Rational Expressions and Functions
Simplifying fractions that have sums and differences of terms with negative exponents.
• #### The Cosine Addition Formulas - Problem 2

How to derive the cosine of a sum formula and use it to find the cosine of an angle.
• #### Derivatives of Polynomial Functions - Problem 1

##### Math›Calculus›The Derivative
How to use the constant multiple rule and the sum rule to differentiate combinations of power functions, radical functions, and reciprocal functions.
• #### The Definite Integral - Concept

##### Math›Calculus›The Definite Integral
How to define the definite integral.
• #### Arithmetic Series - Problem 3

##### Math›Algebra 2›Sequences and Series
How to evaluate a summation notation that yields an arithmetic series.
• #### Geometric Series - Problem 3

##### Math›Precalculus›Sequences and Series
How to evaluate a summation notation that yields a geometric series.
• #### The Definite Integral - Problem 2

##### Math›Calculus›The Definite Integral
How to evaluate a definite integral that involves a parabola.
• #### The Definite Integral - Problem 1

##### Math›Calculus›The Definite Integral
How to use geometry to find the definite integral.
• #### Arithmetic Series - Problem 3

##### Math›Precalculus›Sequences and Series
How to evaluate a summation notation that yields an arithmetic series.
• #### Approximating Area Using Rectangles - Concept

##### Math›Calculus›The Definite Integral
How to approximate the area under a curve using rectangles.
• #### Geometric Series - Problem 3

##### Math›Algebra 2›Sequences and Series
How to evaluate a summation notation that yields a geometric series.