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Fundamental Identities

  1. Dec 2, 2009 #1
    1. The problem statement, all variables and given/known data
    Okay, so this is some trig I learned last year but have since forgotten. If you can give me the first step, I can solve the rest on my own. The given statement is true and you have to prove why using Pythagorean Identities.

    csc2[tex]\alpha[/tex]-1 = cos2[tex]\alpha[/tex]
    ________
    csc2[tex]\alpha[/tex]
     
  2. jcsd
  3. Dec 2, 2009 #2
    The first step is to just divide the numerator on the left side by the denominator. Try it and you will see how it makes sense.
     
  4. Dec 2, 2009 #3

    Dick

    User Avatar
    Science Advisor
    Homework Helper

    You are a little wrong there. I don't have to prove it. YOU have to prove it. csc(alpha)=1/sin(alpha). Just try it. Ok?
     
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