Trial Question (1 Viewer)

[trapizi]

Hi guys, I've done a lot of mechanics questions and I sometimes find questions where require me to integrate something like


In trial and HSC, can I just use the fact that integral is ? OR Do I have to integrate it using partial functions?

 

[Carrotsticks]

For your Trials, we cannot answer because your school can mark however they please.

For the HSC, refer to 2012 HSC Question 13 (a) (i), which needed partial fractions.

http://www.boardofstudies.nsw.edu.a...ematics-extension-2-hsc-sample-answers-12.pdf

In the HSC Solutions, they performed the partial fractions with no working out, and then arrived at your expression after two lines.

I suggest doing that, it really isn't that much longer anyway.

 

[descartes]

If you happen to know the standard integral, then use it and save time.

It is no different to just quoting log sec x for the integral of tanx.

If they want you to use partial fractions, then they will state "integrate using partial fractions", if they don't then just write it down.