# Thread: Help needed in Intergration Questions

1. ## Help needed in Intergration Questions

First post so bear with me if they dont come out right :-)
Im not too sure about the working, i have done this just now and came up with 30.375, the steps i have taken are a bit confusing though.
Thanks very much to anyone who gives me a hand.
1. Calculate at t=4

$\displaystyle \frac{4t- 2t^2 +5t - 6}{t}$

2. Calculate when t= 0.01sec
for this i ended up with 3.1354

$\displaystyle 0.5\cos(2\pi t - \frac {\pi}{2})$

I have a few others but any help with these would be greatly appreciated

2. Originally Posted by rosspetrie
First post so bear with me if they dont come out right :-)
Im not too sure about the working, i have done this just now and came up with 30.375, the steps i have taken are a bit confusing though.
Thanks very much to anyone who gives me a hand.
1. Calculate at t=4

$\displaystyle \frac{4t- 2t^2 +5t - 6}{t}$

2. Calculate when t= 0.01sec
for this i ended up with 3.1354

$\displaystyle 0.5\cos(2\pi t - \frac {\pi}{2})$

I have a few others but any help with these would be greatly appreciated
hey mate,

I'm not exactly sure where you trouble lies, are you having difficulties evaluating f(t) at t = some value say t* ??

if you could elaborate on your problem a little further I would be more than happy to assist.

Regards,

David