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Trig theta question

  1. Apr 17, 2010 #1
    1. The problem statement, all variables and given/known data

    I dont understand the step the math book took to convert sin(theta)/sin(theta)-cos(theta) to 1/sin(theta)-cos(theta)/sin(theta)

    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Apr 17, 2010 #2
    It just divided the whole expression by sin(theta).

    sin(theta)/sin(theta) - cos(theta) = 1 - cos(theta). Divide that by sin(theta) and you get 1/sin(theta) - cos(theta)/sin(theta).

    But in general 1 - cos(theta) does not equal 1/sin(theta) - cos(theta)/sin(theta).
     
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