1. ## indefinate integrals

Hiya,
I'm a first year maths student and I'm really struggling with the calculus and vectors module. I'm getting extra tutoring but I have a lot of work due in before my next session and I'm pretty clueless so any help would be much appreciated!

The first question I'm stuck with is:

evaluate the indefinate integral, t sin(t^2) e^(1+2cost^2) dt

I have no idea where to start so if anyone has time to take me through from basics that would be great. Thank you!

2. Originally Posted by KerryClaire
Hiya,
I'm a first year maths student and I'm really struggling with the calculus and vectors module. I'm getting extra tutoring but I have a lot of work due in before my next session and I'm pretty clueless so any help would be much appreciated!

The first question I'm stuck with is:

evaluate the indefinate integral, t sin(t^2) e^(1+2cost^2) dt

I have no idea where to start so if anyone has time to take me through from basics that would be great. Thank you!
do a u-substitution, $\displaystyle u = 1 + 2 \cos (t^2)$

can you continue? In retrospect, do you see why this makes sense?