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Homework Help: Trigonometry Question!

  1. Nov 23, 2008 #1
    If sinx = -0.40 and tanx > 0, then secx, to the nearest hundreth, is

    A) 0.92

    B) -0.92

    C) -1.09

    D) 1.09

    So I figured that sin^-1 = -23.57817848, but I don't know how to get sec, can someone help!
    Last edited: Nov 23, 2008
  2. jcsd
  3. Nov 23, 2008 #2
    I would assume it is in the 3rd quadrant as well
  4. Nov 23, 2008 #3
    There are 2 angles for x that correspond to sin(x) = -0.40
    the one you found is in the 4th quadrant, there is one in the 3rd quadrant as well
  5. Nov 23, 2008 #4
    Thanks, Ill try solving it now
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