• #### Angle Inclination of a Line - Problem 2

How to find the angle of inclination of a line.
• #### Triangle Side and Angle Inequalities - Problem 3

##### Math›Geometry›Triangles
How to list the sides of adjacent triangles from shortest to longest given the measures of some interior angles.
• #### The Half-Angle Identities - Concept

How to use the power reduction formulas to derive the half-angle formulas.
• #### The Half-Angle Identities - Problem 1

How to use a half-angle formula to evaluate sin(/8).
• #### The Half-Angle Identities - Problem 2

How to use a half-angle formula to evaluate cos(105).
• #### Angle Inclination of a Line - Problem 1

How to find the angle of inclination of a line.
• #### Radian Measure of Angles - Problem 1

##### Math›Precalculus›Trigonometric Functions
How to measure a central angle of a circle when the radius and the length of the intercepted arc are given.
• #### The Angle Between Vectors - Problem 4

##### Math›Precalculus›Vectors and Parametric Equations
How to derive the formula for the angle between two vectors.
• #### The Angle Between Vectors - Concept

##### Math›Precalculus›Vectors and Parametric Equations
How to compute the angle between two vectors.
• #### The Angle Between Vectors - Problem 1

##### Math›Precalculus›Vectors and Parametric Equations
How to compute the angle between two vectors.
• #### Angle Inclination of a Line - Problem 3

How to find the angle of inclination of a line.
• #### The Angle Between Vectors - Problem 3

##### Math›Precalculus›Vectors and Parametric Equations
How to compute one of the angles of a triangle when you are given the coordinates of its three vertices.
• #### Angles in Semicircles and Chords to Tangents - Problem 2

##### Math›Geometry›Circles
How to solve for arcs and angles formed by a chord drawn to a point of tangency.
• #### Triangle Side and Angle Inequalities - Problem 1

##### Math›Geometry›Triangles
How to list the angles of a triangle from smallest to largest given the side lengths.
• #### Angles - Problem 2

##### Math›Pre-Algebra›Introductory Geometry
Using the definition of supplementary or complementary angles to solve for a variable
Tags:
• #### The Angle Between Planes - Problem 2

##### Math›Precalculus›Vectors and Parametric Equations
How to find the angle between two planes.
• #### Evaluating Sine and Cosine at Other Special Angles - Problem 1

##### Math›Trigonometry›Trigonometric Functions
How to measure the sine and cosine of -135?.
• #### Evaluating Sine and Cosine at Other Special Angles - Concept

##### Math›Trigonometry›Trigonometric Functions
How to measure the sine and cosine of 150.
• #### Radian Measure of Angles - Problem 4

##### Math›Trigonometry›Trigonometric Functions
How to find the arc length and area of a sector when the central angle is given in radians or degrees.
• #### Central Angles and Intercepted Arcs - Problem 2

##### Math›Geometry›Circles
How to find the arc and angle measure when a diameter is given, as well as a radius and a chord drawn between the two.