• #### Using the Inverse Trigonometric Functions - Problem 1

How to prove an identity that involves sin^-1(x) and cos^-1(x).
• #### Finding an Inverse Graphically - Problem 1

##### Math›Algebra 2›Inverse, Exponential and Logarithmic Functions
How to graph an inverse of a function using a piece of paper.
• #### Finding an Inverse Graphically - Problem 2

##### Math›Algebra 2›Inverse, Exponential and Logarithmic Functions
How to graph an inverse of a collection of line segments.
• #### Derivatives of Logarithmic Functions - Problem 2

##### Math›Calculus›The Derivative
How to find an equation of the line tangent to the graph of f(x)=ln(x) at a point, and how to use the tangent to approximate values of natural log.
• #### Derivatives of Exponential Functions - Problem 2

##### Math›Calculus›The Derivative
How to use the derivative of an exponential function to find an equation of the tangent line to the graph of f(x) = e^x.
• #### Trigonometric Equations that Require Factoring - Problem 2

How to solve a tangent equation by factoring: tan^2(x) - tan(x) - 2 = 0.
• #### Trigonometric Equations that Require Factoring - Problem 3

How to solve a sine and cosine equation by factoring: ?2 sin2 x ? 5 cos x + 4 = 0.
• #### Trigonometric Equations that Require Factoring - Problem 2

How to solve a tangent equation by factoring: tan^2(x) - tan(x) - 2 = 0.
• #### Trigonometric Equations that Require Factoring - Problem 3

How to solve a sine and cosine equation by factoring: ?2 sin2 x ? 5 cos x + 4 = 0.
• #### Solving a Logarithmic Equation - Problem 5

##### Math›Algebra 2›Inverse, Exponential and Logarithmic Functions
Using the property that if log x = log y, then x = y , and checking for extraneous solutions.
• #### Symmetry of Polar Graphs - Problem 2

##### Math›Precalculus›Polar Coordinates and Complex Numbers
How to determine if the graph of a polar equation is symmetric about the y-axis when the first test of symmetry doesn't work.
• #### Trigonometric Equations that Require Factoring - Problem 1

How to solve a sine equation by factoring: 2 sin2 x ? 3 sin x + 1 = 0.
• #### Trigonometric Equations that Require Factoring - Problem 1

How to solve a sine equation by factoring: 2 sin2 x ? 3 sin x + 1 = 0.
• #### Percents - Problem 3

##### Math›Algebra›Pre-Algebra
How to solve "x% of what is ?"
• #### Percents - Problem 2

##### Math›Algebra›Pre-Algebra
How to solve "What percent of x is ?"
• #### Introduction to Polynomials - Problem 6

##### Math›Algebra 2›Polynomials
Vocabulary of polynomials, including multiplicity, solution, zeros, roots, x-intercepts.
Tags:
• #### Composition of Functions - Problem 1

##### Math›Algebra 2›Functions
How to calculate the composition of functions.
• #### Proportions - Problem 1

##### Math›Algebra›Solving Equations
How to solve proportions when x is in the numerator.