# the add pi identities period   66 videos

• #### Using the Sine and Cosine Addition Formulas to Prove Identities

How to use the sine and cosine addition formulas to prove the cofunction identities.

• #### Using the Sine and Cosine Addition Formulas to Prove Identities

How to use the sine and cosine addition formulas to prove the cofunction identities.

• #### The Half-Angle Identities

How to use the power reduction formulas to derive the half-angle formulas.

the power reduction formulas the half angle formulas quadrants
• #### The Half-Angle Identities

How to use the power reduction formulas to derive the half-angle formulas.

the power reduction formulas the half angle formulas quadrants
• #### Adding and Subtracting Polynomials

##### AlgebraPolynomials

How to add or subtract polynomials.

simplify combine like terms
• #### Electronegativity

##### ChemistryThe Periodic Table

An overview of the periodic trend of electronegativity.

electronegativity

##### ChemistryThe Periodic Table

The periodic trend of atomic radii.

• #### Adding and Subtracting Rational Expression

##### AlgebraRational Expressions and Functions

How to add or subtract rational expressions.

common denominator excluded value
• #### Adding and Subtracting Rational Expressions

##### Algebra 2Rational Expressions and Functions

How to add and subtract rational expressions.

rational expressions adding subtracting lcd least common denominator factoring
• #### Adding and Subtracting Complex Numbers

How to add and subtract complex numbers.

• #### Evaluating the Tangent Function

##### TrigonometryTrigonometric Functions

How to evaluate the tangent of 3*pi/4.

• #### Evaluating the Tangent Function

##### PrecalculusTrigonometric Functions

How to evaluate the tangent of 3*pi/4.

• #### Asymptotes of Secant, Cosecant, and Cotangent

##### TrigonometryTrigonometric Functions

How to find the vertical asymptotes of secant, cosecant, and cotangent.

reciprocal identities vertical asymptotes
• #### Asymptotes of Secant, Cosecant, and Cotangent

##### PrecalculusTrigonometric Functions

How to find the vertical asymptotes of secant, cosecant, and cotangent.

reciprocal identities vertical asymptotes

##### PrecalculusVectors and Parametric Equations

How to add vectors geometrically two ways.

• #### Circumference

##### GeometryCircles

How to calculate the circumference of a circle.

circumference pi distance radius diameter ratio
• #### Hybridization

##### ChemistryChemical Bonds

How to predict the hybridization of atomic orbitals.

hybridization hybrid orbitals sp sigma pi
• #### Transmutation

##### ChemistryNuclear Chemistry

How radioactive elements change their identities through transmutation.

transmutation