Trig Identities by YourMathGal

This collection of videos is from the video series Trig Identities

Trig Identities

Derive Cosine of a Sum Identity preview image

00:19:00

YourMathGal
3023 views
- Currently 4.0/5 Stars.

High School > Trig / Pre Calc

Derive Cosine of a Sum Identity

This video shows the formula for deriving the cosine of a sum of two angles.

Trig Sum and Difference Identities preview image

00:14:45

YourMathGal
2046 views
- Currently 4.0/5 Stars.

High School > Trig / Pre Calc

Trig Sum and Difference Identities

Uses the formula for the cosine of the sum of two angles to derive the formulas for the cosine of...

Derive Tangent of Sum and Examples preview image

00:14:33

YourMathGal
2035 views
- Currently 4.0/5 Stars.

High School > Trig / Pre Calc

Derive Tangent of Sum and Examples

This video derives the identity for the tangent of the sum and difference of angles (or real numb...

Trig Double Angle Formula preview image

00:15:57

YourMathGal
2036 views
- Currently 4.0/5 Stars.

High School > Trig / Pre Calc

Trig Double Angle Formula

Video derives the double angle trigonometry formula and provides examples using the formula.

Derive Trig Half Angle Identities preview image

00:18:04

YourMathGal
1650 views
- Currently 4.0/5 Stars.

High School > Trig / Pre Calc

Derive Trig Half Angle Identities

Video derives the half angle trigonometry identities for cosine, sine and tangent