In Example 4, change cos 1/2x to sin 1/2x and on the right of the equal sign

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In Example 4, change cos 1/2x to sin 1/2x and on the right of the equal sign change the + to −.


Data from Example 4

Solve the equation cos(x/2) = 1 + cos x (0 ≤ x < 2π).

By using the half-angle formula for cos (x/2) and then squaring both sides of the resulting equation, this equation can be solved:

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Related Book For  book-img-for-question

Basic Technical Mathematics

ISBN: 9780137529896

12th Edition

Authors: Allyn J. Washington, Richard Evans

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