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Two cos/sin wave graphing question

  1. Apr 12, 2009 #1
    1. The problem statement, all variables and given/known data

    2ikxo53.jpg

    3. The attempt at a solution

    For #3 I need to finde the cos graph equation here's what I got: shift to the right 2, Amplitude = 3, b = π/2

    equation: y=3cosπ/2(x-2)

    I'm just not sure if i have it in the right format or if I'm even right


    Attempt for #4 Amplitude=2 Shift left = 1 Shift up= 3

    jugzna.jpg n data[/b]


    I'm just not sure if I am doing it right for both of them
     
  2. jcsd
  3. Apr 12, 2009 #2
    You're solutions appear to be right, but I'm not sure what you mean by the right format.
     
  4. Apr 13, 2009 #3
    For your first solution, you are correct, but if when you say "format" you are referring to a simpler form, you may wish to use the identity [tex]cos(x - \pi) = -cos(x)[/tex] to simplify the equation.
     
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