ATAR Notes: Forum

HSC Stuff => HSC Maths Stuff => HSC Subjects + Help => HSC Mathematics Extension 2 => Topic started by: frog1944 on June 25, 2017, 08:12:27 pm

Title: Logarithm that was on the standard integrals table
Post by: frog1944 on June 25, 2017, 08:12:27 pm: Hi,

For integral of $\int \frac{dx}{\sqrt{x^2 \pm a^2}} = ln(x + \sqrt{x^2 \pm a^2})$ are we allowed to use this? It used to be on the standard integral table, but now it's no longer on there, so can we use it or do we need to derive it?

Thanks
Title: Re: Logarithm that was on the standard integrals table
Post by: RuiAce on June 25, 2017, 08:24:14 pm: For past papers, up to you.

In the exam, no. But at the same time it's unlikely that it should show up in the exam anymore either.
Title: Re: Logarithm that was on the standard integrals table
Post by: frog1944 on June 25, 2017, 08:50:43 pm: Ok, thanks :)