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Trigonometry Formulas You Must Know for the ACT

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2016-03-26 15:46:57
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ACT Prep 2026/2027 For Dummies: Book + 4 PracticeTests & 100+ Flashcards Online
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ACT Prep 2026/2027 For Dummies: Book + 4 PracticeTests & 100+ Flashcards Online
ACT Prep 2026/2027 For Dummies book coverExplore Book
Subscribe on Perlego

Some of the questions on the ACT Math test deal with trigonometry problems. Below are some of the most useful formulas for trig ratios, radians, and identities.

  • Six trig ratios:

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  • Formula for radians:

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  • Five trig identities:

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About This Article

This article is from the book: 

About the book author:

Mark Zegarelli is a math tutor and author of several books, including Basic Math & Pre-Algebra For Dummies.