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!

How do you square cosB?

  1. Jan 24, 2009 #1
    1. The problem statement, all variables and given/known data

    [​IMG]

    2. Relevant equations

    how do you square cosB?

    3. The attempt at a solution
     
  2. jcsd
  3. Jan 24, 2009 #2
    Re: squaring

    Hi chemic_23, well you haven't really asked a question. In answer to you how do you square [itex]cos\beta[/itex] (i assume thats what you meant) you can square it like any other number as [itex]\textbf{cos\beta}[/itex] will be a real number if beta is a real number. Is you question find the solutions to this equation, because there are an infinite number of them?

    If you could clarify you question then Im sure you'll find the help you need :D
     
  4. Jan 24, 2009 #3
    Re: squaring

    I'm trying to understand this part of solution
    [​IMG]
    but I don't have any idea on how to square the cosB... It just came out with no detailed solution.... please help
     
  5. Jan 24, 2009 #4
    Re: squaring

    if you have f(l) = (x + y) / z where x,y,z are constants

    remember you can always change that to

    x /z + y/z

    and then what would be f^2 (l)

    (x /z + y/z)^2 = (x /z + y/z)(x /z + y/z)

    and you can expand that right?
     
  6. Jan 24, 2009 #5
    Re: squaring

    thanks:)
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?



Similar Discussions: How do you square cosB?
  1. How do you prove this? (Replies: 4)

  2. How do you (Replies: 4)

  3. How do you solve this? (Replies: 11)

  4. How do you do this? (Replies: 2)

Loading...