1. Limited time only! Sign up for a free 30min personal 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!

Homework Help: Can someone help me with this equation quickly

  1. May 4, 2005 #1


    User Avatar

    i need to rearrange this formula


    in to linear format ( y=mx+c , y=mx)
    and i need to use logs to do so which i have no idea about.
    I understand the very basics of logs, even if someone could just give me a few clues how to work it out that would be great

    can anyone help, will be v grateful

    Last edited: May 4, 2005
  2. jcsd
  3. May 4, 2005 #2


    User Avatar

    there is no "linear format" for the cos function. You could use taylor expansions to derive its series, but that's about it.
  4. May 4, 2005 #3
    are u working on some statistical data?

    I = K (cos(phi))^n
    Taking log on both sides,
    log I = log K + nlog(cos(phi))

    If u put Y = log I , X = log(cos(phi)) and C = log K,
    the equation becomes,
    Y = C +nX

    -- AI
  5. May 4, 2005 #4


    User Avatar

    yes i am, thanks for your help. What you have said looks right ( as far as i know but i will need to look over it to get the undertanding.

    I need to bascially put some data ( n and k are constants) in to a graph which once rearranged should be a straight line.

    thanks again
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook