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Don't stress about memorizing trigonometric identities and equations. This guide provides you with essential formulas for your test, including product-to-sum and sum-to-product identities. You'll learn how to find exact values, prove identities, and solve equations effectively. With clear explanations and examples, you're equipped to tackle any trigonometric problem with confidence. You'll also gain skills in solving for specific variables, ensuring you're prepared for any question. Let’s simplify your understanding of trigonometry!
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15.4 Final Identities and Trig Equations Good News You don’t have to memorize the formulas in this section. I will give these to you on the test.
Find the exact value of . • Prove the identity .
Solve for . • If and , what is ? • Solve for x, where .