View Full Version : Antiderivitive c and d
Gernald
Mar 26, 2009, 10:34 AM
Hi all!
I'm trying to find the anti derivative of a(t)=cos(t)+sin(t)
so far I have sin(t)+c-cos(t) as the antiderivitive but Im confused because the antiderivitive of cos(t) is sin(t)+c and the antiderivitive of sin(t) is -cos(t)+c
so should the antiderivitive of a(t) be sin(t)+c-cos(t)+D??
just confused about the c/d thing.
Thanks!
galactus
Mar 26, 2009, 11:00 AM
The antiderivative of cos(t)+sin(t) would be
sin(t)-cos(t)+C
No need for another constant.
\int \left[cos(t)+sin(t)\right]dt=sin(t)-cos(t)+C
Now, when we take the derivative of sin(t)-cos(t)+C we get back where we started. To cos(t)+sin(t).
Because the derivative of a constant, C, is 0.
ngasnier
Mar 27, 2009, 04:31 PM
Hi all!
I'm trying to find the anti derivitive of a(t)=cos(t)+sin(t)
so far I have sin(t)+c-cos(t) as the antiderivitive but Im confused because the antiderivitive of cos(t) is sin(t)+c and the antiderivitive of sin(t) is -cos(t)+c
so should the antiderivitive of a(t) be sin(t)+c-cos(t)+D ???
just confused about the c/d thing.
Thanks!
It is impossible to identify the constant of integration. The solution which you seek lacks a closed form .
Gernald
Mar 28, 2009, 11:29 AM
It is impossible to identify the constant of integration. The solution which you seek lacks a closed form .
Huh??
I'm just going to go with +c and be done with it.
Thanks anyway.