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Homework Help: Trig Questions

  1. Jun 15, 2010 #1
    1. The problem statement, all variables and given/known data
    Hi, I scanned some few questions from my Trigonometry book that were giving me giving me problems. I tried them but I could not understand what they were asking for..
    Please point me in the right direction and I will do the rest.

    2. Relevant equations

    3. The attempt at a solution

    Attached Files:

  2. jcsd
  3. Jun 16, 2010 #2


    Staff: Mentor

    26) What identities do you know?
    5) Compare sin(5pi/3) with each of the 4 given values. As the problem is written, I see that two of the values are equal.
    14) Which quadrants is the tangent function positive in? Negative in?
    3) x = arctan(-sqrt(3)) <==> -sqrt(3) = tan(x). Which quadrants could x be in? What values of x give tan(x) = -sqrt(3)?
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