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Wjec c2 may 2016

saiko291099

Thought of creating a thread for the exam.

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Reply 1

Fox Corner

Original post by saiko291099

Thought of creating a thread for the exam.

Hi! I moved this to the Maths Exam forum for you - you're more likely to get a good answer here :h:

Reply 2

Saira_98

I'm really hoping that it's going a pretty nice exam like c1

Reply 3

Jack1066

I have a feeling its gonna be harder because C1 was easier than normal

Reply 4

TeeEm

http://www.thestudentroom.co.uk/showpost.php?p=62408735&postcount=2

_IYGB 9.jpg

Reply 5

Jack1066

Ehhh went okay. Not as hard as I thought it would be but there were still some tough questions in there.

I definitely messed up finding the equation of C2, with P and Q. Got the coordinates fine but wasn't sure what I was doing to find the radius of B. I ended up with some stupid decimal as the radius for B

Reply 6

Marcuschho

I found it super tough.. Bye bye medicine..not even at St Georges.
I guess I'll work at MacDonald's when im older..

What does a common chord mean anyways?
And what was the t11 + t12?
Does anyone know the minimum distance from the origin?

Sigh I must be pretty stupid

Reply 7

Emskibump

That exam was so much harder than normal. I couldn't work out the equation of the second circle, and the last question I have no idea if I got right as everybody else I have talked to got different answers? Did anybody else get 5.0???

I got 19.667 :P

Original post by Marcuschho

if t12 + 13 = 50

then t11 + t14 must also equal 50. Its what I got anyway. It was only one mark anyway so I guessed you wouldn't need to do a calculation. For the 2nd part of that I did a simultaneous equation and got something like 600 laps.

The minimum distance from the origin, I worked out the radius of the circle and then took that away from the length of line from the circle to the origin.

Common chord question I blanked on if I'm honest. Don't remember seeing a question like that in any of the papers I've done. I found P+Q and did length AB - AP or something like that to find the radius of B. I don't think I got it right as I got a massive decimal

Reply 10

username2324343

Found it super tough , I didn't have a clue how to do the circle equation , I got points P and Q I think. Couldn't do the last part of the log question either and blanked on the triangle one even though pretty sure that's an easy one

Reply 11

Swj12

I think that c2 went better than c1..
Did anyone else get d=4/Z for the log question?

Posted from TSR Mobile

Reply 12

godblessme

i think the distance between the centre of the circle and P OR Q is the radius.

(edited 7 years ago)

Reply 13

godblessme

Original post by Swj12

I think that c2 went better than c1..
Did anyone else get d=4/Z for the log question?

Posted from TSR Mobile

Yeah i got a similar one!
z=4/d

Reply 14

FusionNetworks

The last question, I got 6.7 cm.

Original post by Swj12

I think that c2 went better than c1..
Did anyone else get d=4/Z for the log question?

Posted from TSR Mobile

Yes d= 4/Z

Reply 15

burninginneon

For the equation of the second circle, I got (x-6)^2+(x-7)^=20 using the coordinates of the centre and then subbing in the x and y values of P and Q to get the 20. Have no idea if it's right but it's all I could think of doing.

Reply 16

Emskibump

Does anyone know if there are any unofficial mark schemes yet?

Reply 17

Rozza B

Common chord was confusing. But fairly certain it means that P and Q lie on the second circle, allowing you to work out the equation of the second circle as you have a line intersecting it, the centre, and two points. Circle 1 intersects circle 2 at P and Q. It's difficult to picture with the way the question was phrased but that's the only way you could get a solution from it