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# Maths edexcel c4 coordinate geometry Watch

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2. (Original post by TenOfThem)

How should I proceed? @@

Thanks

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3. (Original post by Lamalam)

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The integral between curve and y axis would be given by between limits and
4. (Original post by brianeverit)
The integral between curve and y axis would be given by between limits and
why square root 2 and minus square 2?

how would you approach this question?

sorry i know i am stupid ><

thanks!
5. (Original post by Lamalam)
why square root 2 and minus square 2?

how would you approach this question?

sorry i know i am stupid ><

thanks!
The limits will be the values of t which make x=0, i.e the points on the y axis.
6. (Original post by brianeverit)
The limits will be the values of t which make x=0, i.e the points on the y axis.
Then isnt t= -1 and 1 ?
This is what I got when I draw the graph .
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7. (Original post by Lamalam)
Then isnt t= -1 and 1 ?
This is what I got when I draw the graph .
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and the curve should be a parabola with horizontal axis y=0 and vertex at (-2,0)

Sorry, my mistake. I was looking at question 8 not question 7.
8. (Original post by brianeverit)

and the curve should be a parabola with horizontal axis y=0 and vertex at (-2,0)
I think you are looking at Q8
9. (Original post by Lamalam)
How should I proceed? @@

Thanks

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the question is asking about the area of the finite region bound by the loop so your limits are wrong. And also you can take only the upper area and then multiply by 2

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10. (Original post by Lamalam)
Then isnt t= -1 and 1 ?
This is what I got when I draw the graph .
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you can take from 0 to 1 and then multiply by 2 as it is symmetrical around the x axis.

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12. So that agrees with the book's answer?

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13. (Original post by StUdEnTIGCSE)
So that agrees with the book's answer?

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Yes

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14. (Original post by StUdEnTIGCSE)
So that agrees with the book's answer?

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When I looked at my answer again , I sstart wondering why I did this correctly @@ I put the two limits of intergral according to when x=0, its seems not reasonable @@,

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15. (Original post by Lamalam)
When I looked at my answer again , I sstart wondering why I did this correctly @@ I put the two limits of intergral according to when x=0, its seems not reasonable @@,

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I started FP1 just the last month so its baffling me too.

I'm gonna investigate it tonight
16. (Original post by Lamalam)
When I looked at my answer again , I sstart wondering why I did this correctly @@ I put the two limits of intergral according to when x=0, its seems not reasonable @@,

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I'm afraid this is beyond me
17. (Original post by TenOfThem)
...
How is this possible?

Thank you

18. (Original post by StUdEnTIGCSE)
How is this possible?

Thank you

? I don't get what you mean
19. (Original post by Lamalam)
? I don't get what you mean
20. (Original post by StUdEnTIGCSE)

umm still a bit confused, would you please explain to me further?

thanks a lot!!

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