Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Basic trig question for physics

  1. Oct 12, 2006 #1
    I have to calculate the phase constant for a mass and spring system for simple harmonic motion. If I find that phi equals the arctan of some negative over another negative number, do I have to add pi to the answer for it to be in quadrant III?

    I know this is more of a precalculus question but I don't know if the rules are different for physics.
  2. jcsd
  3. Oct 12, 2006 #2
    yes, you have to add [tex] \pi [/tex].
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook