Help with Simplification

  • Thread starter Kat007
  • Start date
  • #1
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Homework Statement


Hey, does anyone know how to further simplify this:



Homework Equations


ln(exp(-a) + exp(a))?


The Attempt at a Solution

 

Answers and Replies

  • #2
rock.freak667
Homework Helper
6,223
31


There is no such rule as ln(x+y)=lx+lny if that is what you wanted to know. The most I can think of is that cosh(x)= 1/2(ex+e-x)
 
  • #3
29
0


Thank you, this is good. I was after a trig simplification.
I knew one for 2cos(x) = exp(-ix) + exp(ix) but couldn't remember one without the imaginary.
Ta!!!
 

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