# the sine of a sum formula   138 videos

• #### Formulas

##### Pre-AlgebraSolving Equations and Inequalities

The importance of solving literal equations for a given variable

• #### 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
• #### Deriving the Quadratic Formula

##### Algebra 2Quadratic Equations and Inequalities

How to derive the quadratic formula by completing the square.

functions domain parent functions inequalities interval notation
• #### Conic Section Formulas

##### Algebra 2Conic Sections

How to identify a conic section by its formula.

parabola circle ellipse hyperbola center focus
• #### Conic Section Formulas

##### PrecalculusConic Sections

How to identify a conic section by its formula.

parabola circle ellipse hyperbola center focus
• #### The Distance Formula in Polar Coordinates

##### PrecalculusPolar Coordinates and Complex Numbers

How to derive the distance formula for polar coordinates.

polar coordinates the law of cosines triangles
• #### Using Sine to Calculate the Area of a Triangle

##### GeometryBasic Trigonometry

How to calculate the area of any triangle using two sides and an included angle.

area of a triangle sine
• #### Using Sine to Calculate the Area of a Triangle

##### TrigonometryBasic Trigonometry

How to calculate the area of any triangle using two sides and an included angle.

area of a triangle sine
• #### Using Sine to Calculate the Area of a Triangle

##### PrecalculusBasic Trigonometry

How to calculate the area of any triangle using two sides and an included angle.

area of a triangle sine
• #### Transforming the Graphs of Sine and Cosine

##### TrigonometryTrigonometric Functions

How the values of A and B affect the shape of the graph y = A sin(Bx).

sine period amplitude stretch compression reflection
• #### Transforming the Graphs of Sine and Cosine

##### PrecalculusTrigonometric Functions

How the values of A and B affect the shape of the graph y = A sin(Bx).

sine period amplitude stretch compression reflection
• #### Change of Base Formula

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

How to use the change of base formula for logs to evaluate a logarithmic statement.

change of base log logarithm
• #### Change of Base Formula

##### PrecalculusExponential and Logarithmic Functions

How to use the change of base formula for logs to evaluate a logarithmic statement.

change of base log logarithm
• #### More Transformations of Sine and Cosine

##### TrigonometryTrigonometric Functions

How the value of h affects the shape of the graph y = A sin(B(x-h)).

transformations sine period amplitude phase shift horizontal shift
• #### More Transformations of Sine and Cosine

##### PrecalculusTrigonometric Functions

How the value of h affects the shape of the graph y = A sin(B(x-h)).

transformations sine period amplitude phase shift horizontal shift
• #### Find an Equation for the Sine or Cosine Wave

##### TrigonometryTrigonometric Functions

How to identify the graph of a stretched cosine curve.

sine cosine period amplitude intercepts turning points
• #### Find an Equation for the Sine or Cosine Wave

##### PrecalculusTrigonometric Functions

How to identify the graph of a stretched cosine curve.

sine cosine period amplitude intercepts turning points
• #### Equation of a Circle

##### GeometryPythagorean Theorem

How to derive the equation for a circle using the distance formula.