• #### Radii to Tangents - Concept

##### Math›Geometry›Circles
How to define a tangent line; how to determine the angle a radius to a tangent forms.
• #### Angle Inclination of a Line - Problem 1

How to find the angle of inclination of a line.
• #### Angle Inclination of a Line - Concept

How to find the angle of inclination of a line.
• #### Angle Inclination of a Line - Problem 3

How to find the angle of inclination of a line.
• #### Angle Inclination of a Line - Concept

How to find the angle of inclination of a line.
• #### Angle Inclination of a Line - Problem 1

How to find the angle of inclination of a line.
• #### Angle Inclination of a Line - Problem 2

How to find the angle of inclination of a line.
• #### Angle Inclination of a Line - Problem 2

How to find the angle of inclination of a line.
• #### Angle Inclination of a Line - Problem 3

How to find the angle of inclination of a line.
• #### Tangent Segments to a Circle - Problem 3

##### Math›Geometry›Circles
How to calculate the measure of an intercepted arc formed by two tangents drawn from the same point.
• #### Radii to Tangents - Problem 2

##### Math›Geometry›Circles
How to calculate the measure of a missing angle in a quadrilateral formed by two circles that are tangent but not congruent and their radii drawn to a common line of tangency.
• #### Lines in Polar Coordinates - Problem 3

##### Math›Precalculus›Polar Coordinates and Complex Numbers
How to find equations of a line tangent to a circle in polar and rectangular coordinates.
• #### The Derivative Function - Problem 2

##### Math›Calculus›The Derivative
How to use values of the derivative obtained by estimating slopes of tangent lines to sketch the graph of the derivative function.
• #### 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.
• #### The Product Rule - Problem 3

##### Math›Calculus›Techniques of Differentiation
How to differentiate a product of two functions when values of each function are given, and how to find an equation of a tangent line to the product function's graph.
• #### 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.
• #### Instantaneous Rate of Change - Problem 2

##### Math›Calculus›The Derivative
How to estimate the instantaneous rate of change of a quantity by measuring the slopes of tangent lines on a graph of quantity vs. time.
• #### The Definition of the Derivative - Problem 3

##### Math›Calculus›The Derivative
How to compute the derivative using the definition, and how to find an equation of the line tangent to its graph at a point.
• #### Derivatives of Power Functions - Problem 2

##### Math›Calculus›The Derivative
How to compute the derivative of f(x) = x^(-2) and how to find an equation of the line tangent to its graph at x= -2.