Hi,

I'm trying to find the laplace transform of the following function:

f(t) = cos(at+b)

I'm having trouble with eulers identity:

I know exp(iat) = cos(at) + isin(at)

I don't know if exp(iat+b) = cos(at+b) + isin(at+b)

thx 4 help

Printable View

- Nov 25th 2009, 10:17 AMProvokeLaplace transform
Hi,

I'm trying to find the laplace transform of the following function:

f(t) = cos(at+b)

I'm having trouble with eulers identity:

I know exp(iat) = cos(at) + isin(at)

I don't know if exp(iat+b) = cos(at+b) + isin(at+b)

thx 4 help - Nov 25th 2009, 10:31 AMProvoke
I calculated as if what I said earlier was true, I get:

sexp(b) / (s^2+a^2)

can anyone confirm? thx - Nov 26th 2009, 03:15 AMmr fantastic