# Hyperbolic functions ((

1. Apr 22, 2010

### ibysaiyan

Hyperbolic functions :(((

1. The problem statement, all variables and given/known data
Question is:

and

2. Relevant equations

Now from what i can recall the formula for sin(A+B) = sinAcosB+sinbcosA
so same goes for hyperbolic function i suppose?
sinh(2x+x) = sinh2xcoshx+cosh2xsinx
(2sinhxcoshx)coshx + (cos^2hx+sinh^2hx)sinx :/ am i on the right track... what confuses me are the identities of cosh2x .

EDIT: WOULD I USE COSH2X= 1+2SINH^2X?
CONFUSED :(
3. The attempt at a solution

2. Apr 22, 2010

### tiny-tim

Hi ibysaiyan!

(try using the X2 tag just above the Reply box )
You can use either (cosh2x+sinh2x) or 1 + 2sinh2x

3. Apr 22, 2010

### ibysaiyan

Re: Hyperbolic functions :(((

Hello there! thanks for replying but lol i have just over-confused myself :(

4. Apr 22, 2010

### ibysaiyan

Re: Hyperbolic functions :(((

OHHHH I GET IT NOW.. i was subbing an 2x where actually it was just an 'x'.
Thanks for the reply though ;)