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Edexcel A2 C4 Mathematics June 2015 - Official Thread

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What was the angle for the vector qu?.

Original post by goonieskellie

Oh ****, I think I answered in degrees as got around 27? How many marks do you think I'll lose?

Me too!!! 27.1 right?
I think only one mark will be lost hopefully.
I don't think they will accpet it.

(edited 8 years ago)

IHateC12k14paper

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what was the answer to the last question and the what did you get as the value for the constant k before the integral of cos^2theta?

Original post by Neilg99

What was the angle for the vector qu?.

31 degrees or something? Can't quite remember

Original post by jf1994

Well they didn't actually specify to use radians so my guess is they'll accept both

It is calculus, it has to be in radians

Original post by jf1994

31 degrees or something? Can't quite remember

Correct

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(edited 8 years ago)

I think you needed to give it indegrees, 'cause in radians it didn't even make a year. I'm not sure though. I believe they will take both correct

Original post by rpa

what was the answer to the last question and the what did you get as the value for the constant k before the integral of cos^2theta?

k=4

What did u guys get for the coordinates in Q2?

Original post by Neilg99

What was the angle for the vector qu?.

31.82

Original post by Jimmy007uk

What was the x coordinate of Q?

2- (1 / ln3)

Original post by Nightmare8

I think you needed to give it indegrees, 'cause in radians it didn't even make a year. I'm not sure though. I believe they will take both correct

Yeah personally I thought 27 sounded like a good number hahaha

Original post by rpa

what was the answer to the last question and the what did you get as the value for the constant k before the integral of cos^2theta?

I had 13pi/ln 3.
And k=4.

k was 2

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Original post by cfcdrog

What did u guys get for the coordinates in Q2?

(+-24/5,+-16/5)

I think I may have messed up the question where you had to use the substitution to find the area underneath the curve, I ended up a negative value? I just cancelled the negative sign cos it's an area and was hoping to go back to it but I ran out of time

should we have done it in degrees or radians

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