• #### The Law of Cosines - Problem 1

##### Math›Trigonometry›Basic Trigonometry
How to use the law of cosines to find a missing side in a triangle.
• #### The Inverse Tangent Function - Problem 1

How to define the inverse tangent function.
• #### The Inverse Cosine Function - Problem 1

How to define the inverse cosine function.
• #### The Law of Cosines - Problem 2

##### Math›Trigonometry›Basic Trigonometry
How to use the law of cosines to find a missing angle given three sides in a triangle.
• #### The Law of Sines - Problem 1

##### Math›Trigonometry›Basic Trigonometry
How to find the length of a triangle given two angles and a side, using the law of sines.
• #### Angle Inclination of a Line - Problem 1

How to find the angle of inclination of a line.
• #### The Inverse Sine Function - Concept

How to restrict the domain of sine so it will have an inverse function.
• #### The Inverse Sine Function - Problem 2

How to use apply the inverse identities for sine.
• #### Angle Inclination of a Line - Concept

How to find the angle of inclination of a line.
• #### The Inverse Cosine Function - Problem 2

How to use apply the inverse identities for cosine.
• #### The Inverse Tangent Function - Concept

How to restrict the domain of tangent so it will have an inverse function.
• #### The Inverse Tangent Function - Problem 2

How to use apply the inverse identities for tangent.
• #### Angle Inclination of a Line - Problem 3

How to find the angle of inclination of a line.
• #### The Half-Angle Identities - Problem 2

How to use a half-angle formula to evaluate cos(105).
• #### The Inverse Sine Function - Problem 3

How to graph a simple transformation of y = sin^-1 x
• #### The Inverse Tangent Function - Problem 3

How to graph a simple transformation of y = tan^-1(x)