AQA Core 3 - Tuesday 10th June 2014 (AM) - Official Thread

Original post by cuckoo99

Intergation by substitution is probably the most long winded thought provoking topic in C3. I also find drawing the inverse trig graphs hard lol

Yeah, Substitution is pretty annoying - especially when you have do it twice!

For the inverse trig graphs- if you're stuck just use your calc to find certain points like 90, 180 , etc and you'll understand the general shape.

(edited 9 years ago)

Reply 24

Original post by mA*ths

For me, it's definitely integration, especially by substitution. By far and away though, Simpson's and the Mid Ordinate rules are the dryist, most time consuming topics in A Level Maths as a whole. I've lost count of the number of times I've debated gouging my own eyes out as opposed to facing the prospect of spending yet another 5 minutes tackling one of those beauties!!

The truth has been spoken :tongue:

Reply 25

the_googly

Original post by iAkash

Yeah, Substitution is pretty annoying - especially when you have do it twice!

For the inverse trig graphs- if you're stuck just use your calc to find certain points like 90, 180 , etc and you'll understand the general shape.

Do you mean integration by parts twice?

Reply 26

Original post by the_googly

Do you mean integration by parts twice?

Yeah pretty much. I got confused for a sec.

(edited 9 years ago)

Reply 27

the_googly

Original post by iAkash

Yeah pretty much. I got confused for a sec.

I agree. I hate it when questions drag on too much.

Must say June 09 paper is pretty sweet

Reply 28

MarkProbio

Original post by iAkash

Yeah pretty much. I got confused for a sec.

For a sec, not a cosec?

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Reply 29

Original post by MarkProbio

For a sec, not a cosec?

Posted from TSR Mobile

Damn you!

Reply 30

obsessedfreak95

2

What would you guys say is the hardest C3 past paper you've done? Want to try some hard ones to get me ready!

Reply 31

the_googly

Original post by obsessedfreak95

What would you guys say is the hardest C3 past paper you've done? Want to try some hard ones to get me ready!

I found last year's tough but that's probably because it was the first one I did

Reply 32

Sam_Chem

3

Original post by obsessedfreak95

What would you guys say is the hardest C3 past paper you've done? Want to try some hard ones to get me ready!

Jan 13 was the hardest i've tried in my opinion. If the last question doesn't click to start with, you're going to have a bad time... :P

Reply 33

MarkProbio

I find the recent integration questions the hardest, but once you understand how to incorporate trig into substitution its not too bad.

Exact values are often pretty hard too, theres one question where the final answer is a fraction multiple of pi and - although I got the correct answer - my calculator left in decimal form. Weird. It was quite a weird decimal though!

Posted from TSR Mobile

Reply 34

scarlotbridge

Oh my gosh, I did that paper aswell today. I had the blue/white casio calculaters and kept getting a decimal as an answer when IT WAS CLEARLY 2 FRACTIONS ADDING TOGETHER.

Reply 35

username972634

Original post by scarlotbridge

Oh my gosh, I did that paper aswell today. I had the blue/white casio calculaters and kept getting a decimal as an answer when IT WAS CLEARLY 2 FRACTIONS ADDING TOGETHER.

Click the F<->D button to interchange

Reply 36

username972634

Original post by MarkProbio

I find the recent integration questions the hardest, but once you understand how to incorporate trig into substitution its not too bad.

Exact values are often pretty hard too, theres one question where the final answer is a fraction multiple of pi and - although I got the correct answer - my calculator left in decimal form. Weird. It was quite a weird decimal though!

Posted from TSR Mobile

just divide answer by π and then try and figure out the fraction. e.g.: 1.047197551/π =0.33333 = ⅓ so solution is π/3. (Or get natdisplay calc)

Reply 37

MarkProbio