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College Algebra & Trigonometry, 2018a

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468 CHAPTER 10. TRIGONOMETRIC IDENTITIES AND EQUATIONS<br />

Another approach to solving trigonometric equations involves using Pythagorean<br />

Identities to make a substitution that so that the equation can be simply solved<br />

by the quadratic formula. Here’s an example:<br />

Example 2<br />

Solve the given equation for 0 ◦ ≤ x

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