Double-Angle Formulas

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Presentation transcript:

Double-Angle Formulas Section 5.5

Double-Angle Formulas

Solving a Multiple-Angle Equation Solve

Using Double-Angle Formulas to Analyze Graphs Analyze the graph of in the interval [0, 2π]

Evaluating Functions Involving Double Angles Use the following to find

Note The double-angle formulas are not restricted to the angles 2Ө and Ө. Other double combinations, such as 4Ө and 2Ө or 6Ө and 3Ө, are also valid. Here are two examples. By using the double-angle formulas together with the sum formulas you can form other multiple-angle formulas.

Homework Page 394 1-17 odd