• #### The Definitions of Sine and Cosine - Concept

##### Math›Precalculus›Trigonometric Functions
How we define sine and cosine for all angle measures using the unit circle.
• #### The Definitions of Sine and Cosine - Concept

##### Math›Trigonometry›Trigonometric Functions
How we define sine and cosine for all angle measures using the unit circle.
• #### Special Isosceles Triangle Properties - Problem 2

##### Math›Geometry›Triangles
How to find the measure of a vertex angle when a median is given in an isosceles triangle.
• #### Locus and Definition of a Circle and Sphere - Problem 2

##### Math›Geometry›Circles
How to find the locus of points that are equidistant from the sides of an angle.
• #### Vector Operations in 3D - Problem 2

##### Math›Precalculus›Vectors and Parametric Equations
How to find the angle between two vectors in three dimensions.
• #### Applied Linear Equations: Geometry Problem - Concept

##### Math›Precalculus›Linear Equations and Inequalities
How to find the angles of a triangle by creating a linear equation.
• #### Applied Linear Equations: Geometry Problem - Concept

##### Math›Algebra 2›Linear Equations
How to find the angles of a triangle by creating a linear equation.
• #### Finding the Roots of a Complex Number - Problem 3

##### Math›Precalculus›Polar Coordinates and Complex Numbers
How to use DeMoivre's Theorem and the half-angle formulas to compute the cube roots of a complex number, 7+24*i.
• #### Vector Operations in 3D - Problem 1

##### Math›Precalculus›Vectors and Parametric Equations
How to find the angle between two vectors in 3D, and how to tell whether two vectors are parallel or perpendicular.
• #### ASA and AAS - Concept

##### Math›Geometry›Triangles
How to use the ASA and AAS shortcuts to determine the congruence of two triangles.
• #### ASA and AAS - Problem 1

##### Math›Geometry›Triangles
How to use ASA and AAS to determine congruence of triangles and denote the congruence correctly.
• #### ASA and AAS - Problem 3

##### Math›Geometry›Triangles
How to use ASA and AAS to determine the congruence of adjacent triangles and denote the congruence correctly.
• #### ASA and AAS - Problem 4

##### Math›Geometry›Triangles
How to use ASA and AAS to determine the congruence of adjacent triangles and denote the congruence correctly.
• #### Isosceles Triangles - Concept

##### Math›Geometry›Triangles
How to define isosceles triangles, their components and how to determine their properties.
• #### Parallelogram Properties - Problem 3

##### Math›Geometry›Polygons
How to find the lengths of the diagonals in a parallelogram if they are given in terms of a variable.
• #### Parallelogram Properties - Concept

##### Math›Geometry›Polygons
How to identify all of the special properties of parallelograms and use them to solve problems.
• #### Parallelogram Properties - Problem 2

##### Math›Geometry›Polygons
How to find the perimeter of a parallelogram when the sides are given in terms of a variable.
• #### Kite Properties - Concept

##### Math›Geometry›Polygons
How to identify a kite and its special properties.
• #### Area of Kites and Rhombuses - Problem 3

##### Math›Geometry›Area
How to calculate the area of a rhombus given the length of half of the diagonals.
• #### Area of Kites and Rhombuses - Problem 2

##### Math›Geometry›Area
How to find the length of a diagonal in a kite given the area and the length of the other diagonal.