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Precalculus · Chapter 5 · Lesson 5.3 · Printable PDF

The Pythagorean Identities Worksheet with Answer Key

6 problems on the pythagorean identities. 2 pages, with a worked answer key.

6 problems2 pagesanswer key
Printable The Pythagorean identities worksheet with answer key - Precalculus (Page 1 PDF preview)
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What's on the worksheet

  1. Decide whether some angle θ has both values.
  2. An angle θ has θ = 52 and θθ < 0.
  3. θ is in Quadrant III, and u = θ.
  4. θ is in Quadrant II and θθ = -38.
  5. Let t = θ.
  6. In this problem you derive the other two Pythagorean identities from 1 + ²θ = ²θ, without going back to the circle.

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The free lesson teaches it with worked examples and practice problems.

The Pythagorean identities: the lesson ›

More Chapter 5 worksheets: Trigonometric identities and equations