Power Reducing Formulas in Trigonometry

This video tutorial covers the use of power reducing formulas to simplify trigonometric expressions. It begins with an introduction to the formulas for sine, cosine, and tangent, followed by detailed examples demonstrating how to apply these formulas to simplify expressions. The video includes step-by-step solutions to example problems, helping viewers understand the process of using power reducing formulas effectively. The tutorial concludes with a final example and a summary of the key concepts covered.

What is the power reducing formula for sine squared theta?

• 1/2 * (1 + cosine 2 theta)

• 1 - cosine 2 theta

• 1 + cosine 2 theta

• 1/2 * (1 - cosine 2 theta)

How is tangent squared theta expressed using sine and cosine?

• 1 - cosine 2 theta / 1 + cosine 2 theta

• sine theta / cosine theta

• 1 + cosine 2 theta / 1 - cosine 2 theta

• sine squared theta / cosine squared theta

Tags

CCSS.HSF.TF.C.9

What is the result of applying the power reducing formula to cosine squared 2 theta?

• 1/2 * (1 - cosine 4 theta)

• 1 - cosine 4 theta

• 1 + cosine 4 theta

• 1/2 * (1 + cosine 4 theta)

When simplifying sine to the fourth power of x, what is the first step?

• Rewrite as cosine squared times cosine squared

• Rewrite as sine squared times sine squared

• Apply the tangent formula

• Use the double angle formula

What is the simplified form of 1 - cosine squared theta?

• cosine squared theta

• sine squared theta

• 1

• tangent squared theta

In the example problem, what is the result of foiling (1 - cosine 2 theta) * (1 - cosine 2 theta)?

• 1 + cosine 2 theta

• 1 - cosine 2 theta

• 1 + 2 cosine 2 theta + cosine squared 2 theta

• 1 - 2 cosine 2 theta + cosine squared 2 theta

Tags

CCSS.HSF.TF.C.9

What is the power reducing formula for sine 2 theta?

• 1/2 * (1 - cosine 2 theta)

• 1/2 * (1 + cosine 4 theta)

• 1/2 * (1 - cosine 4 theta)

• 1/2 * (1 + cosine 2 theta)

Tags

CCSS.HSF.TF.C.9

How do you express sine to the fourth power times cosine squared using power reducing formulas?

• 1/8 * (1 - cosine 4 theta)

• 1/16 * (1 - cosine 4 theta)

• 1/4 * (1 - cosine 4 theta)

• 1/2 * (1 - cosine 4 theta)

What is the final simplified form of sine to the fourth power times cosine squared?

• 1/2 * (1 - cosine 4 theta)

• 1/4 * (1 - cosine 4 theta)

• 1/8 * (1 - cosine 4 theta)

• 1/16 * (1 - cosine 4 theta)

What is the key takeaway from the video regarding power reducing formulas?

• They simplify trigonometric expressions by reducing powers.

• They are only applicable to sine functions.

• They are used to find angles in triangles.

• They are used to solve quadratic equations.