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March 28, 2024, 10:00:51 pm

Author Topic: Maths Extension 2 - Discussion, Questions, Potential Solutions  (Read 13014 times)

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JedToner

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Re: Maths Extension 2 - Discussion, Questions, Potential Solutions
« Reply #15 on: October 27, 2020, 04:54:42 pm »
Could anyone post a pdf of the paper by any chance???

DarkWorld

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Re: Maths Extension 2 - Discussion, Questions, Potential Solutions
« Reply #16 on: October 27, 2020, 04:59:01 pm »
I think a lot of people underestimate the paper's difficulty. It leaned on the easier end of things, but I didn't really feel it was a blessing or anything.

Admittedly Q16a(i) sent my head spinning for a while before I finally understood what was going on.

Yeah unfortunately my first mistake was straight up integrating by parts instead of integrating a single sin(x) to be dcosx then doing by parts. Second mistake was converting cos(2\theta) to 2sin^2(\theta)-1.

sweetiepi

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Re: Maths Extension 2 - Discussion, Questions, Potential Solutions
« Reply #17 on: October 27, 2020, 09:06:50 pm »
Could anyone post a pdf of the paper by any chance???
Unfortunately, NESA exams are copyrighted, so they cannot be distributed on the forum. :)
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RuiAce

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Re: Maths Extension 2 - Discussion, Questions, Potential Solutions
« Reply #18 on: October 27, 2020, 09:10:51 pm »
Yeah unfortunately my first mistake was straight up integrating by parts instead of integrating a single sin(x) to be dcosx then doing by parts. Second mistake was converting cos(2\theta) to 2sin^2(\theta)-1.
Ah that's very unfortunate indeed. The method for \( I_n = \int \sin^n x\,dx \) is actually one of the classic trig function reductions.

Trig identities do get nasty. I've done them so many times and I still make minor errors occasionally.

DarkWorld

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Re: Maths Extension 2 - Discussion, Questions, Potential Solutions
« Reply #19 on: October 27, 2020, 09:35:24 pm »
Unfortunately, NESA exams are copyrighted, so they cannot be distributed on the forum. :)

God damn it!

RuiAce

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« Last Edit: October 28, 2020, 03:03:22 pm by RuiAce »

Paradoxica

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Re: Maths Extension 2 - Discussion, Questions, Potential Solutions
« Reply #21 on: October 30, 2020, 01:44:18 am »
the look on my face when i see that the NESA paper and the BOS paper have the same integral

HUA0007

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