Trig Identities for Pre-Calculus

Part of the Pre-Calculus For Dummies Cheat Sheet

Of course you use trigonometry, commonly called trig, in pre-calculus. And you use trig identities as constants throughout an equation to help you solve problems. The always-true, never-changing trig identities are grouped by subject in the following lists:

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Pre-Calculus For Dummies Cheat Sheet

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