Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Solve : 9 cosh9y dy = 4 sinh 4x dx

  1. Apr 1, 2005 #1
    I did this:

    9 Integral cosh9ydy = 4 Integral sinh4xdx

    9/9 sinh9y + C = -cosh4x
    C = - cosh4x -sinh9y

    Is this right , or wrong, or is there more to it.
     
  2. jcsd
  3. Apr 1, 2005 #2

    Zurtex

    User Avatar
    Science Advisor
    Homework Helper

    This is wrong, you will find the sign does not change when integrating sinh or cosh.

    Also if you wanted an explicit equation, there are ways of simplifying it (actually you'd probabily need some initial conditions).
     
    Last edited: Apr 1, 2005
  4. Apr 2, 2005 #3

    dextercioby

    User Avatar
    Science Advisor
    Homework Helper

    [tex]\int \sinh x \ dx =\cosh x +C [/tex] !!

    Daniel.
     
  5. Apr 2, 2005 #4
    [tex]9\int\cosh{9y}dy = \frac{9\sinh{9y}}{9} + C = {\sinh{9y}} + C[/tex]

    [tex]4\int\sinh{4x}dx = \frac{4\cosh{4x}}{4} + C = {\cosh{4x} + C[/tex]
     
    Last edited: Apr 2, 2005
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?



Similar Discussions: Solve : 9 cosh9y dy = 4 sinh 4x dx
  1. Dy/dx = 0 (Replies: 22)

  2. Meaning of Dy/Dx (Replies: 19)

Loading...