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!

Summation of Trignometric Series

  1. Oct 31, 2007 #1
    Sum the following:

    Sin(x) + Sin(x+d) + Sin(x+2d)........+Sin(x+(n-1)d).

    I only know that summation of Sin and Cos functions whose arguments are in Arithmetic Progression can be done through telescopic series. But I dont know how to proceed. Please Help!
  2. jcsd
  3. Oct 31, 2007 #2
    Use the identity: Sin(x) = [Exp(ix) - Exp(-ix)]/(2i)

    Then you get two ordinary geometric series.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?

Similar Discussions: Summation of Trignometric Series
  1. Summation of series (Replies: 12)

  2. Summation of series (Replies: 6)

  3. Summation of series (Replies: 2)

  4. Summation of series (Replies: 4)