✓ Lesson Check
Do you know HOW?
- Use a double-angle identity to find the exact value of
- Use a half-angle identity to find the exact value of
- Given
-
Do you UNDERSTAND?
-
Error Analysis A problem on a test asks for the value of
- Express
-
Writing Explain how to express
Practice and Problem-Solving Exercises
A Practice
Use an angle sum identity to derive each double-angle identity. A See Problems 1, 2, and 3.
Use a double-angle identity to find the exact value of each expression.
Use a half-angle identity to find the exact value of each expression. A See Problems 4.
-
-
-
-
-
- tan
-
-
Given
Given
B Apply
-
Think About a Plan Triangle ABC is a right triangle with right angle C. Show that
- What identity will you use?
- How can you find the ratio or ratios you need to substitute in the identity?
-
What will be your last step in the solution?
Table of Contents
- 5-1 Polynomial Functions
- 5-2 Polynomials, Linear Factors, and Zeros
- 5-3 Solving Polynomial Equations
- 5-4 Dividing Polynomials
- 5-5 Theorems About Roots of Polynomial Equations
- 5-6 The Fundamental Theorem of Algebra
- 5-7 The Binomial Theorem
- 5-8 Polynomial Models in the Real World
- 5-9 Transforming Polynomial Functions