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Calculators Not getting the right answers for sine, cosine and tangent with TI-89

  1. Sep 27, 2007 #1
    I'm not getting the right answers for sine, cosine and tangent functions. I have no idea why this is.
     
  2. jcsd
  3. Sep 27, 2007 #2
    did you check whether you're in radians or degrees?
     
  4. Sep 27, 2007 #3
    How do I do that? I just got this calculator.
     
  5. Sep 27, 2007 #4
    click on F2 (window)

    look for radians | degrees

    and highlight the one you want and click enter
     
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