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Trigonometry For Dummies, 2nd Edition by Mary Jane Sterling

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Part II

Trigonometric Functions

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webextras.eps Find out more about finding values for trig functions in an article at www.dummies.com/extras/trigonometry.

In this part…

  • Define the basic trig functions using the lengths of the sides of a right triangle.
  • Determine the relationships between the trig cofunctions and their shared sides.
  • Extend your scope to angles greater than 90 degrees using the unit circle.
  • Investigate the ins and outs of the domains and ranges of the six trig functions.
  • Use reference angles to compute trig functions.

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