amp

  1. M

    amp, period, frequency, ps

    How can I find the period, frequency, and phase shift to problems set up like.. h= -15cos (pie t/3) +21 what if it is like E= 150cos 80 pie t I am familiar with solving these equations with. . 360/k and -c/k and all that, but this time around I'm not getting the right results. I...