Edexcel A2 C4 Mathematics June 2015 - Official Thread

have any of you ever seen questions involving arc sin etc. in papers?

I seen a question in a class test saying show that arcsinx+arccosx= something find the something


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I seen a question in a class test saying show that arcsinx+arccosx= something find the something


Posted from TSR Mobile

Wow i was just looking at arcsin stuff. Please help

Jan 2007 Q8

http://www.mathsgeeks.co.uk/allpapers/C3/C3EdexcelJan07QP.pdf

Basically, I thought cos y = sin (y+pi/2)

But when I use this, I get an incorrect answer


And also in review exercise of c3 book there is a question:

y= arcsin x


a) Express arccos x in terms of y

Wow i was just looking at arcsin stuff. Please help

Jan 2007 Q8

http://www.mathsgeeks.co.uk/allpapers/C3/C3EdexcelJan07QP.pdf

Basically, I thought cos y = sin (y+pi/2)

But when I use this, I get an incorrect answer


And also in review exercise of c3 book there is a question:

y= arcsin x


a) Express arccos x in terms of y

Wow i was just looking at arcsin stuff. Please help

Jan 2007 Q8

http://www.mathsgeeks.co.uk/allpapers/C3/C3EdexcelJan07QP.pdf

Basically, I thought cos y = sin (y+pi/2)

But when I use this, I get an incorrect answer


And also in review exercise of c3 book there is a question:

y= arcsin x


a) Express arccos x in terms of y

Thank you for both replies but and I understand both of your formulae, but I thought that mine should still work. Is it incorrect?

Since this is the last year before A-level's format changes I think the examiners will probably want to go out with a big boom. I'm guessing this years paper will be really hard!

Remember though the last paper will be next year as the people in Year 12 are still on the same spec as us.

Since this is the last year before A-level's format changes I think the examiners will probably want to go out with a big boom. I'm guessing this years paper will be really hard!

Remember though the last paper will be next year as the people in Year 12 are still on the same spec as us.

Hi everyone, hope you're all well. To say I am s***ting myself for this exam is a a total understatement. I am literally just learning integration for C4 and am struggling with what seems the easiest type :[[[[

I'm using exam solutions, looking at integration of (ax+b)^n, can anyone explain this concept to me?

Much thanks!

Edexcel Maths reform is not until 2017 as far as i'm aware...

http://qualifications.pearson.com/en/qualifications/edexcel-a-levels/reforms.html

Oh right, I'm way off then. That helps a lot, but pretty sure exam is still going to be hard

Yup. I'm expecting very very difficult papers. Cant even get high marks on the easy ones atm :P

When integrating (ax+b)^n the power n needs to be more than -1 or less than -1. If the power n is minus one then you cannot use this integration and you will need to use the natural log integration.

Integrating (ax+b)^n example:

Integrate (2x+3)^-4

First step would be to add 1 to the power.

(2x+3)^-3 then, instead of multiplying like in differentiation, you divide by the new power...

((2x+3)^-3)/-3) This is not all, now if you remember in differentiation you differentiated the inside of the bracket and multiplied it to the original. But in integration you differentiate the inside of the bracket and divide.

((2x+3)^-3)/(-3 x 2)

Simplifying gives you...
((2x+3)^-3)/(-6)

Good luck.