Lesson: Double-Angle and Half-Angle Identities Glencoe • Algebra 2 • Prentice Hall • Algebra 2 • Common Core • Glencoe • Algebra 2 • Common Core

Mathematics

In this lesson, we will learn how to use the Pythagorean identity and double-angle formulas to evaluate trigonometric values.

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Q1:

Find the value of given where without using a calculator.

Q2:

Find the value of given without using a calculator.

Q3:

Find, without using a calculator, the value of given where .

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