Your Resource for Stronger Math Skills
Trigonometry Facts
Flashcards and Learning Center

Flashcards can help you memorize:

  • the values of the various trigonometric functions at nice input values
  • the main trigonometric identities

Learning Center resources will help you learn these facts.

Knowing these trigonometry facts well makes trigonometry much easier to master!


Definitions of the Trigonometric Functions Values of the Trigonometric and Inverse Trigonometric Functions Trigonometric Identities
  • Cofunction, symmetry and translation identities: Shuffled or Unshuffled (18 cards)
  • Fundamental, sum and difference, double angle and half-angle identities: Shuffled or Unshuffled (17 cards)
  • Both collections of identities above: Shuffled or Unshuffled (35 cards)
  • Product-sum, product (prosthaphaeretic), and triple angle identities: Shuffled or Unshuffled (10 cards)

Learning Center

The Amazing Unit Circle The unit circle definitions of the trigonometric functions provide a wealth of information about those functions.
Exact Values of the Trigonometric Functions at the "nice" angles. All the values collected on one page.
Exact Values of Inverse Trigonometric Functions at the "nice" values. The values of inverse sine, inverse cosine and inverse tangent collected on one page.

More facts will be added, so be sure to come back and visit again soon.

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Now available: Amazing Unit Circle t-shirt shows properties of the trigonometric functions that are easily observed from the unit circle definitions of these functions. It's a great gift for students and teachers.

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