1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Harmonic Motion in One dimension -- Question in equation derivation

  1. Mar 12, 2015 #1
    1. The problem statement, all variables and given/known data
    I am curious as to how the second line in the equation is equal to the third line in the equation. The book my class is using is Taylor and it just skips so many steps. What happens to the sign, I know this must relate to euler in some way I am just not sure how. Thank you
    367-5-5P-i36.png
    I am just curious as to why and how

    2. Relevant equations


    3. The attempt at a solution
     
  2. jcsd
  3. Mar 12, 2015 #2

    SammyS

    User Avatar
    Staff Emeritus
    Science Advisor
    Homework Helper
    Gold Member

    Hello Futurestar33. Welcome to PF !

    Use angle addition/subtraction formula on cos(ωt - δ) .
     
  4. Mar 12, 2015 #3

    BiGyElLoWhAt

    User Avatar
    Gold Member

  5. Mar 12, 2015 #4

    BiGyElLoWhAt

    User Avatar
    Gold Member

    I don't see why they include the second line, seems irrelevant since cos(theta) = cos(-theta)
     
  6. Mar 12, 2015 #5
    Thank you guys
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted



Similar Discussions: Harmonic Motion in One dimension -- Question in equation derivation
Loading...