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# Edexcel FP2 Official 2016 Exam Thread - 8th June 2016 watch

1. That damn question 4b needs to use substitution and someone told me that it has appeared in one of the past papers
wtf????
2. (Original post by zcy980528)
someone tell me how to integrate e^2x.sinx
Yes tell me. That question killed me!!
3. (Original post by OllieUnofficialW)
32.5 something, i got theta as a nasty value like 0.723
Ohhh Thanks god I got the same .. I have been so worried
4. (Original post by Chirstos Ioannou)
I have
How did you find it?
5. (Original post by Lilylollydove7)
Yes tell me. That question killed me!!
someone just told we need to use SUBSTITUTION
6. Well it seems like a uniform disaster for everyone. Low grade boundaries I'm thinking - but FP2 "low" boundaries are like 68/75 for an a*

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7. (Original post by edothero)
Would be good, except that's sinhx not sinx
No not if I used Euler's relation
e^ix = cosx + isinx
e^-ix = cosx - isinx
(e^ix - e^-ix)/2 = 2isinx/2
then idk if you can do this but i took the i out of all of it to get (e^x - e^-x)/2 = sinx
8. (Original post by zcy980528)
someone tell me how to integrate e^2x.sinx
IBP and then you get the e^2xsinx again and have to add it to both sides and divide - very mean!

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9. No complex transformations either.. Spent so long revising them too. Christ sake edexcel
10. (Original post by sameenshaw)
someone just told we need to use SUBSTITUTION
Nah, parts

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11. Question 4 Integral Solution

Question 4b

let In=e^2x*sinx

By parts twice gives

In= 0.5e^2x*sinx - 0.25e^2x*cosx - Integral of 0.25e^2x*sin x
Integral of 0.25e^2x*sin x = 0.25 InHence, 5/4 In = 0.5e^2x*sinx - 0.25e^2x*cosxTherefore In = 1/5e^2x * (2sinx - cosx)
12. **** Edexcel *******s!! FP2 is usually guaranteed 75, that was atrocious!
The tell arsey he can't do mark schemes and now they violate is in FP2.
13. (Original post by HarshaPeed)
I'm probably really stupid for doing this but I kept it as costheta= 3/4 and used arcos3/4 all the way through. Lord help me.
Nah you're not that gives you the most accurate answer

(Original post by zcy980528)
someone tell me how to integrate e^2x.sinx
Integration by parts twice to get the integral of e^(2x)sin(x) on both sides, then you can rearrange to find the integral of e^(2x)sin(x)
14. did anyone manage question 5? I couldn't get 53/480 for my final answer........
15. (Original post by Lilylollydove7)
Yes tell me. That question killed me!!
I used Euler's relation to get everything in terms of e
16. (Original post by zcy980528)
someone tell me how to integrate e^2x.sinx
Use integration by parts twice and you will get I=.......-4I
17. anyone confident about what x tends towards as t tends to infinity? I guessed infinity, anyone know???
this is question 4a or 4b I think.
18. Grade boundaries should be kind if it was very tricky. Like last year's FP3 was absurdly low.
I can spare/want to spare myself an hour of analysis revision so if anyone linked the paper I could probs do solutions. Doubt they will/can though but just putting it out there
19. Predict the FP2 grade boundaries here:
20. (Original post by anhaanha)
Ohhh Thanks god I got the same .. I have been so worried
Same, arccos of 3/4, i need to have done well in every other Q to make up for Q4

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