## Use half-angle formula to find tan(7pi/8)

This video screencast was created with Doceri on an iPad. Doceri is free in the iTunes app store. Learn more at http://www.doceri.com.

From Mark Dwyer

This video screencast was created with Doceri on an iPad. Doceri is free in the iTunes app store. Learn more at http://www.doceri.com.

From Mark Dwyer

Using the half angle formula find the exact value of the sin 22.5.

From MSolved Tutoring

In this video, I use half-angle formulas to find the exact value of the sine, cosine, or tangent of an angle. Don't forget that you can check your answers quickly and ...

From Rajendra Dahal

Use half angle formulas to find exact values of the given trig expression.

From Mark Dwyer

In a 2 part video I work many examples of evaluating trigonometric expressions involving half and double angle identities. Evaluating Trigonometry Expressions ...

From ProfRobBob

Precalculus: Compute sine and cosine of 9pi/8. We emphasize the use of the double angle formula for cosine over a half angle formula. In either case, one is ...

From MathDoctorBob

This is part of a series of videos computing using half angle identities. See Intro and parts A-F. Videos by Julie Harland organized at YourMathGal.com.

From YourMathGal

This is part of a series of videos computing using half angle identities. See Intro and parts A-F. Videos by Julie Harland organized at YourMathGal.com.

From YourMathGal

This is part of a series of videos computing using half angle identities. See Intro and parts A-F. Videos by Julie Harland organized at YourMathGal.com.

From YourMathGal

Solve trigonometric equations by using the double angle, half angle and power reducing formulas.

From DrCraigMcBridePhD

Solve a trig equation over the interval 0 to 2pi. Involves substitution, understanding of double angle arguments.

From Mark Dwyer