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SHM phase constant sign

  1. Jun 12, 2014 #1
    Please look at picture.
    My textbook only gives the answer with -pi as a phase constant. But, since we are at "a switching point" on the unit circle, the sign doesn't really matter. The graphs give the same result whether a positive or negative sign is used. Am I right? Does it conceptually change anything?
     

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  2. jcsd
  3. Jun 12, 2014 #2

    berkeman

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    Staff: Mentor

    I'm guessing that pi is the constant. Can you show us the equation?

    When you have y(t) = sin (ωt - Θ), Theta is the phase constant...
     
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