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# Edexcel C2 20th May 2015 *Official Thread* watch

1. (Original post by kf141998)
when finding area between a line and a curve is it better to make a shape and substract them or intergrate them by taking the lines away? hope that makes sense
Integrate both curve and line the take away one of them depending on question thats how i would do it

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2. (Original post by kf141998)
when finding area between a line and a curve is it better to make a shape and substract them or intergrate them by taking the lines away? hope that makes sense
Making a shape is normally quicker - but often requires the use of formulas which you have to memorise.

Using lines in my opinion is easier, but is often longer, and often more errors are made this way (states this in several examiners reports) unless you have practised this method, I would use the shape one
3. If anyone not sure look at this

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Attached Images

4. Good Luck
5. I really hope this is an easy paper seeing as C1 wasnt :P

I AM NOT READY FOR THIS!!

I also hope I dont have to draw a sine/cos/tan graph because I only learnt the CAST quadrant method :L
6. (Original post by a.a.k)
If anyone not sure look at this

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I dont know the area of a segment in a circle and havent come across it before. I normally found the area of the sector, then the area of the shape inside it (circle or triangle) and take them away from each other ??
I really hope this is an easy paper seeing as C1 wasnt :P

I AM NOT READY FOR THIS!!

I also hope I dont have to draw a sine/cos/tan graph because I only learnt the CAST quadrant method :L
Learn how the shape looks like generally and it follows the same pattern.

Sine - remmeber it goes through the zero.
Cos - It doesnt goes through zero
Tan- Its a sin graph flipped up
I dont know the area of a segment in a circle and havent come across it before. I normally found the area of the sector, then the area of the shape inside it (circle or triangle) and take them away from each other ??
Samething but its more working u would waste ur time

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9. Alright i am off to school. Goodluck

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10. (Original post by a.a.k)
Samething but its more working u would waste ur time

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KISS

Keep It Simple Stupid
11. Does anyone know how to integrate to infinity???

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12. (Original post by Azzer11)
Does anyone know how to integrate to infinity???

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I didn't think we needed to know that

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13. (Original post by Azzer11)
Does anyone know how to integrate to infinity???

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yes you just think of the infinity as being equal to zero
14. (Original post by Azzer11)
Does anyone know how to integrate to infinity???

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Its not on the spec for c2 buddy

If you are really interested then :-
15. (Original post by thiss1)
yes you just think of the infinity as being equal to zero
So infinity just means intergrate at zero?

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16. good luck everyone
17. (Original post by frances98)
So infinity just means intergrate at zero?

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they may give to limits say infinty and -2
f(infinity)=0
f(infinity) equals - f(2)
18. i should really have gotten a new calculator all the buttons have been rubbed off
19. they may give to limits say infinty and -2f(infinity)=0f(infinity) - f(2)
20. (Original post by n2697)
Attachment 402501Guys how do you work out B? Can you explain it step by step? Thanks
Just factorise it

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