time signals

[vptran84]

Hi, wat would you get if you add these:

3cos(600*pi*t) + 5sin(1000*pi*t - 45degrees) + 5sin(1200*pi*t)? thanks in advance...

[TenaliRaman]

what exactly are u looking for? cuz if u want to combine this into 1 expression then it must be ugly .... u can plot the graph in graphmatica and see the graph of the expression ...

-- AI

[vptran84]

yes i want to combine them into one...does anyone know how to combine it? and if they do, and you give me some tips? thanks

[TenaliRaman]

set 3cos(600*pi*t) + 5sin(1000*pi*t - 45degrees) = rsin(alpha*t + beta)
try to find r,alpha and beta.

then set 5sin(1200*pi*t) + rsin(alpha*t+beta) = r'sin(alpha'*t+beta')
try to find r',alpha' and beta'.

and ur done!
simple isn't it? :tongue2:

-- AI

[chroot]

It is not possible to combine these three terms into one sine or cosine term.

- Warren