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Mega A Level Maths Thread MK II

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Reply 1640

Kvothe the Arcane

Original post by tigerz

C2 people,
I don't understand this at all! Where did cos come from? :s-smilie:

I only know that sin²x=1-cos²x could someone explain please?

c2 seta5.png

Can A2 skills solve this mystery? :dontknow:

Original post by MathsNerd1

e^\frac{3i\pi}{2}

Original post by DJMayes

\dfrac{1}{1}=1

Can you have a look at this please? I know what I'd do to answer the Q but the markscheme seems confusing :frown:

(edited 10 years ago)

Reply 1641

MathsNerd1

Original post by reubenkinara

Can you have a look at this please? I know what I'd do to answer the Q but the markscheme seems confusing :frown:

Which part? The first or second part?

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Reply 1642

tigerz

Oh gosh, i've managed to confuse quite a few people with this question, its 9 marks so I tried to do it but clearly failed, hopefully someone on here can solve it!

Thank you reubenkinara :h:

(edited 10 years ago)

Reply 1643

Kvothe the Arcane

Original post by MathsNerd1

Which part? The first or second part?

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I might need to actually do it. I just thought that for a C2 Q the answer would be instantly apparent. Can you help the OP?

Reply 1644

MathsNerd1

Original post by tigerz

Oh gosh, i've managed to confuse quite a few people with this question, its 9 marks so I tried to do it but clearly failed, hopefully someone on here can solve it!

Thank you

Well this seems more of something that would arise in C3 but basically expand the 2 formulas and then let A+B = X and A-B = Y so to eliminate B just add them together and divide by 2 and then do the same to get B which you then sub in when you add the 2 formulas together.

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Reply 1645

MathsNerd1

Original post by reubenkinara

I might need to actually do it. I just thought that for a C2 Q the answer would be instantly apparent. Can you help the OP?

I feel like I have but it just seems not what you'd see in C2, I see that in C3 instead.

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Reply 1646

Kvothe the Arcane

Original post by MathsNerd1

I feel like I have but it just seems not what you'd see in C2, I see that in C3 instead.

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I thought so too. I'm going to do it on paper now :smile:

Reply 1647

tigerz

Original post by reubenkinara

I thought so too. I'm going to do it on paper now :smile:

Original post by MathsNerd1

I feel like I have but it just seems not what you'd see in C2, I see that in C3 instead.

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Yeah, a few people have said that now, I think its from the old c2 spec, I always manage to find the dodgiest papers :cyber:

Reply 1648

MathsNerd1

Original post by reubenkinara

I thought so too. I'm going to do it on paper now :smile:

Okay, I'm trying to do it in my head to see how far I get :tongue:

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Reply 1649

MathsNerd1

Original post by tigerz

Yeah, a few people have said that now, I think its from the old c2 spec, I always manage to find the dodgiest papers :cyber:

Which year was it?

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Reply 1650

Kvothe the Arcane

Original post by MathsNerd1

Okay, I'm trying to do it in my head to see how far I get :tongue:

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The last part is a bit puzzling. I think now that the 0s must be

\theta s

Reply 1651

MathsNerd1

Original post by reubenkinara

The last part is a bit puzzling. I think now that the 0s must be

\theta s

Yeah, I'd take that assumption too.

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Reply 1652

tigerz

Original post by MathsNerd1

Which year was it?

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Its a c2 practice paper heres a link :smile:

Original post by reubenkinara

The last part is a bit puzzling. I think now that the 0s must be

\theta s

OHH that makes sense lols I was so confused

c2 set a5.doc318.5KB

Reply 1653

Xx4L3x

Original post by L'Evil Fish

My C3 is this Friday. Haven't started.

C4 is 13th June. Haven't started.

So I hope not :redface:

Youre naturally good at maths so youll be fine !!

Reply 1654

MAyman12

Original post by ljh950912

Does anyone know what the grade boundaries were so low for c2 in jan 2010?

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Because of the circle question, the logs question and integration. I think the integration question was pretty easy though but the circle one was quite tough :s-smilie:

Reply 1655

L'Evil Fish

Original post by MathsNerd1

Best of luck with those exams, you'll smash them! :biggrin:

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Thanks a lot :smile:

Although I learnt the content "properly" (still haven't learnt religious beliefs on all) last night :yy:

as it's a self taught module...

So I'll do that third lesson.

The other is business, which is common sense.

C3 is 3 days :moon:

I'll know whether the chance of an A* still exists then :redface:

Reply 1656

MathsNerd1

Original post by L'Evil Fish

Thanks a lot :smile:

Although I learnt the content "properly" (still haven't learnt religious beliefs on all) last night :yy:

as it's a self taught module...

So I'll do that third lesson.

The other is business, which is common sense.

C3 is 3 days :moon:

I'll know whether the chance of an A* still exists then :redface:

Very nice, I couldn't leave my stuff to the night before, I'd be incredibly stressed if I did!

Also if you put in the practice now you should still be able to get it, if not then maybe you should resit the A Level with a different board as universities are only bothered about the marks and grades you get, not that you did it early or anything. Good luck!!!

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Reply 1657

L'Evil Fish