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Manipulating Trig Functions

  1. Nov 12, 2013 #1
    1. The problem statement, all variables and given/known data
    Write sin(7t)-sin(6t) as a product of two trig. functions.


    2. Relevant equations
    e^(ix)=cos(x)+isin(x)
    sin(2x)=2cos(x)sin(x)
    cos(2x)=cos^2(x)-sin^2(x)


    3. The attempt at a solution

    I do not really know how to approach this. I have tried using the sin(2x) identity but I could not get the correct answer from it. Can anyone help?
     
  2. jcsd
  3. Nov 12, 2013 #2

    Dick

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    Science Advisor
    Homework Helper

    There is a trig identity for sin(A)-sin(B). You can either look it up or work it out by figuring out what sin(a+b)-sin(a-b) would be using the addition formulas.
     
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