# sum of differences   108 videos

• #### The Cosine Addition Formulas

How to derive the cosine of a difference formula.

the unit circle the law of cosines the distance formula cosine of a difference formula
• #### Exterior Angles of a Polygon

##### GeometryPolygons

How to find the sum of the exterior angles in a polygon and find the measure of one exterior angle in an equiangular polygon.

exterior angle sum of angles equiangular polygon
• #### Ohm's Law

##### PhysicsElectricity

How to use Ohm's law to relate potential difference and current flow.

ohm's law electric current potential difference

• #### Solving Exponential Equations with the Different Bases

##### Algebra 2Inverse, Exponential and Logarithmic Functions

Solving an exponential equation by taking the log of both sides.

exponential function log of both sides
• #### Solving Exponential Equations with the Different Bases

##### PrecalculusExponential and Logarithmic Functions

Solving an exponential equation by taking the log of both sides.

exponential function log of both sides
• #### Supplementary and Complementary Angles

##### GeometryGeometry Building Blocks

How to identify supplementary and complementary angles.

angles sum right angle
• #### Series and Summation Notation

##### Algebra 2Sequences and Series

How to define a series.

series sum of a sequence
• #### Series and Summation Notation

##### PrecalculusSequences and Series

How to define a series.

series sum of a sequence

• #### Overview of the Different Methods of Solving a Quadratic Equation

##### Algebra 2Quadratic Equations and Inequalities

How to know which method to use when solving a quadratic equation.

factoring square root property completing the square quadratic formula pros cons comparison
• #### Permutations

##### Algebra 2Combinatorics

How to find the number of permutations of a set.

different arrangement permutation factorial permute
• #### Permutations

##### PrecalculusTopics in Discrete Math

How to find the number of permutations of a set.

different arrangement permutation factorial permute
• #### Elements and Compounds

##### ChemistryMatter

The differences between elements and compounds.

elements compounds
• #### Types of Reactions

##### ChemistryChemical Reactions

The different types of chemical reactions.

types of reaction combustion synthesis decomposition
• #### Wave Characteristics

##### PhysicsVibration and Waves

Understanding the different characteristics of waves.

wave characteristics medium restorative property inertial propertytypes of waves pulse periodic frequency wavelength amplitude
• #### Nuclear Reactions

##### PhysicsNuclear Physics

The different types of nuclear reactions.

• #### Characteristics of Life

##### BiologyFoundation of Biology

The main different characteristics of life.

characteristics of life
• #### Elements and Compounds

##### BiologyChemical Basis of Life

The differences between elements and compounds.

elements compounds