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# AQA A2 Mathematics MPC3 Core 3 - Wednesday 15th June 2016 [Official Thread] watch

1. (Original post by muonfrisbee98)
Hey - I was just wondering if anyone knew whether the fx9860GII is permitted to use?
Thanks 😊
Yes it is
2. (Original post by muonfrisbee98)
Hey - I was just wondering if anyone knew whether the fx9860GII is permitted to use?
Thanks 😊
This is the one I will be using
3. Found a tricky integral, if anyone wants to have a go at trying it in the attached file. I can upload the solution too if needed

4. (Original post by Dapperblook22)
Found a tricky integral, if anyone wants to have a go at trying it in the attached file. I can upload the solution too if needed

Can i see the solution to this please?
5. (Original post by Dapperblook22)
Found a tricky integral, if anyone wants to have a go at trying it in the attached file. I can upload the solution too if needed

6. (Original post by Mowerharvey)
Can i see the solution to this please?
Please find attached the solution - I doubt anything this tough will appear in C3, uploaded it so people could practice more substitution questions.
7. (Original post by Dapperblook22)
Please find attached the solution - I doubt anything this tough will appear in C3, uploaded it so people could practice more substitution questions.
quite easier than I expected that to be honest, just a quick question when we are doing it with integrals,

do we sub X into our substituion to find our new integrals if you know what I mean?
8. (Original post by Dapperblook22)
Please find attached the solution - I doubt anything this tough will appear in C3, uploaded it so people could practice more substitution questions.
thanks!
I saw your sin^5x integral haha
did you get
-cosx - 2/3cos^3x - 1/5cos^5x + C ?
9. (Original post by SunDun111)
quite easier than I expected that to be honest, just a quick question when we are doing it with integrals,

do we sub X into our substituion to find our new integrals if you know what I mean?
If it is an indefinite integral, then you replace u with whatever function you assigned to it.

If it is a definite integral, then you can just change the limits in terms of u then substitute into the integral in terms of u.
10. (Original post by harv221)
thanks!
I saw your sin^5x integral haha
did you get
-cosx - 2/3cos^3x - 1/5cos^5x + C ?
Almost, I got +2/3 cos^3x
11. (Original post by Dapperblook22)
If it is an indefinite integral, then you replace u with whatever function you assigned to it.

If it is a definite integral, then you can just change the limits in terms of u then substitute into the integral in terms of u.
Eh I dont get it definite, indefinite ? what do you do I thoguht say for example if the limits are 2 and 1 and U = 2x + 3

you sub 2 into U to get new limits?
12. (Original post by SunDun111)
Eh I dont get it definite, indefinite ? what do you do I thoguht say for example if the limits are 2 and 1 and U = 2x + 3

you sub 2 into U to get new limits?
Definite integrals have limits, indefinte integrals do not.

Yes, the substitution is correct for the new limits.
13. (Original post by Dapperblook22)
Please find attached the solution - I doubt anything this tough will appear in C3, uploaded it so people could practice more substitution questions.
They have asked harder questions than that on C3 papers
14. (Original post by Dapperblook22)
Found a tricky integral, if anyone wants to have a go at trying it in the attached file. I can upload the solution too if needed

That substitution is not necessary. You can replace a cos^2(X) using the trig identity cos^2(X)=1-sin^2(X), expand and use the reverse chain rule.
15. (Original post by bartbarrow)
They have asked harder questions than that on C3 papers
Yeah I agree Jan 2012 to be precise, probs hardest one ever lets hope nothing as dirty as that comes up
16. (Original post by SunDun111)
Yeah I agree Jan 2012 to be precise, probs hardest one ever lets hope nothing as dirty as that comes up
I'll be sure to go through that shortly
17. Do people find C3 easier than C4?
18. (Original post by tanyapotter)
Do people find C3 easier than C4?
Relatively, only because i enjoyed C3 a little bit more though
19. Part D anyone?
20. How do you write sin(^2)x on a calculator?

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