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Mega A Level Maths Thread MK II

Reply 1920

OP

I still have no idea how I didn't get 100 for C1, and C3 I somehow wasted enough time that I couldn't to the last part of the final question... worth like 4 raw marks :colonhash:

5 more mins and I would have got 100, even 3/4 marks in that question would have given me 100 UMS! (because that paper was 74/75 for full UMS)

I'm ungrateful ( :lol:

) tbh, I should have done better.

C1 fair enough, me too.
C3 your own fault :mmm:

Reply 1921

Moon1ight

15

Has anyone who has got an A at stats got any tips to do well in the exam ?

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Reply 1922

MathsNerd1

17

Original post by joostan

Ahh, I love a good DE, I'll see if I can dig something up :tongue:

Who doesn't :tongue:

Thanks I'm looking forward to attempting it tomorrow :biggrin:

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Reply 1923

justinawe

19

Original post by L'Evil Fish

C1 fair enough, me too.
C3 your own fault :mmm:

I know I'll probably get hate for this, but 95 in C3 seems quite subpar... and not representative of my ability imo :redface:

97/98 would have been fine, but 95 :/

Reply 1924

L'Evil Fish

OP

18

Here is my plan:

Smash C3 and aim for 100.
Try and get a good A in C4.

Which definitely means an A* if I get C3 100 and any A in C4.

Then, say I applied for Cambridge. I would do my three strongest FM modules, to show I can get consistent 95+.

Good plan? :ahee:

Reply 1925

joostan

13

Original post by MathsNerd1

Who doesn't :tongue:

Thanks I'm looking forward to attempting it tomorrow :biggrin:

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I expect somebody doesn't :lol:

Reply 1926

justinawe

19

Original post by L'Evil Fish

Here is my plan:

Smash C3 and aim for 100.
Try and get a good A in C4.

Which definitely means an A* if I get C3 100 and any A in C4.

Then, say I applied for Cambridge. I would do my three strongest FM modules, to show I can get consistent 95+.

Good plan? :ahee:

Why not smash C4 as well? :sly:

Reply 1927

MathsNerd1

17

Original post by joostan

I expect somebody doesn't :lol:

That is true, I just can't see why you wouldn't like them as they're fun in my opinion :tongue:

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Reply 1928

L'Evil Fish

OP

18

Original post by justinawe

Why not smash C4 as well? :sly:

Chemistry I want to prioritise in a way... Although knowing me, I'll put C4 first.

It's hard though :frown:

What's Tan(2x) equivalent to? Easy way to remember

Reply 1929

joostan

13

Original post by L'Evil Fish

Chemistry I want to prioritise in a way... Although knowing me, I'll put C4 first.

It's hard though :frown:

What's Tan(2x) equivalent to? Easy way to remember

\dfrac{2\tan(x)}{1-\tan^2(x)}

Not sure about an easy way :laugh:

Reply 1930

MathsNerd1

17

Original post by L'Evil Fish

Chemistry I want to prioritise in a way... Although knowing me, I'll put C4 first.

It's hard though :frown:

What's Tan(2x) equivalent to? Easy way to remember

Just use the formula in the booklet where both A and B are x :smile:

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Reply 1931

justinawe

19

Original post by L'Evil Fish

Chemistry I want to prioritise in a way... Although knowing me, I'll put C4 first.

It's hard though :frown:

What's Tan(2x) equivalent to? Easy way to remember

I just derive it from the addition formula in the formulae booklet :holmes:

Reply 1932

L'Evil Fish

OP

18

Original post by joostan

\dfrac{2\tan(x)}{1-\tan^2(x)}

Not sure about an easy way :laugh:

I'll remember that now :tongue:

Original post by MathsNerd1

Just use the formula in the booklet where both A and B are x :smile:

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I've never used a formula booklet :/

Original post by justinawe

I just derive it from the addition formula in the formulae booklet :holmes:

As above.

Reply 1933

joostan

13

Original post by L'Evil Fish

I'll remember that now :tongue:

I've never used a formula booklet :/

As above.

I just remember the formula for tan(A+B) then work it out, after a couple of times you just remember these things :tongue:

Spoiler

Reply 1934

justinawe

19

Original post by L'Evil Fish

I'll remember that now :tongue:

I've never used a formula booklet :/

As above.

Then use it now :sly:

Reply 1935

L'Evil Fish

OP

18

Original post by joostan

I just remember the formula for tan(A+B) then work it out, after a couple of times you just remember these things :tongue:

Spoiler

I use the calculations :colonhash:

Original post by justinawe

Then use it now :sly:

I don't have one :redface:

I always have to derive my inverse trig from first principles as a result...

Reply 1936

joostan

13

Original post by L'Evil Fish

I use the calculations :colonhash:

I don't have one :redface:

I always have to derive my inverse trig from first principles as a result...

Inverse trig?

So if I asked:
For a random variable

X \approx B(20,0.5)

Find:

P(X \leq 18)

You'd do

P(X=0) + P(X=1) + . . . + P(X=18)

?

EDIT: Can't seem to get the tilda so I used approx :s-smilie:

(edited 10 years ago)

Reply 1937

QwertyG

9

Hi can someone help me with S2 hypothesis testing please.

I done the part to the get the first 3 marks but im not seeing where to get the 2 and the 10.

I would assume P(X<=A) < 0.025 but I dont know to go from there.

Reply 1938

L'Evil Fish

OP

18

Original post by joostan

Inverse trig?

So if I asked:
For a random variable

X \approx B(20,0.5)

Find:

P(X \leq 18)

You'd do

P(X=0) + P(X=1) + . . . + P(X=18)

?

Like for two marks if they ask:

Differentiate sin^-1(7x) I do it from scratch

Yeah :/ it's never that high though, most I've done is... About 6 of them