# Edexcel A2 C3 Mathematics 12th June 2015Watch

This discussion is closed.
3 years ago
#3001
Can someone lease tell me how they solved

cos x + sin x 1
--------------- = ---
cos x - sin x 2

or am I just being a complete retard?
0
3 years ago
#3002
(Original post by AJeeeee)
omds Sara, vectors is in C4, i was just kidding! damn.
looool sorry excuse me i just panicked
0
3 years ago
#3003
(Original post by thefuhrer)
its definitely decreasing d
increasing! K was negative in bold!
0
3 years ago
#3004
Most of the people on this thread are not 'crying' about the exam.
We're just discussing and comparing answers after the exam so we can have a rough idea of how we did, and move on, and understand where we went wrong (which is one of the most important things for future improvement).
Isn't that what this thread was (mainly) for in the first place?
There'd be no point to this thread anymore if everyone went off and revised C4 immediately. Here we have a chance to help others and be reassured ourselves.
Quit trying to run other peoples' lives.
1
3 years ago
#3005
(Original post by TeeEm)
I am dying to see this trig identity ...

Yeh .. i messed up on it too.

It was 5 marks aswell.

Then my mind went blank on part b of that question and there goes 9 marks.

Rest was pretty good though. Porbably lost 12-13 marks
0
3 years ago
#3006
How many question were??
0
3 years ago
#3007
Can someone go over Q5b which was differentiating x=(4y-2sin(y))^2 and getting the tangent equation
0
3 years ago
#3008
(Original post by dandroff)
oh, i only attempted it once though, but got more solutions? i got 8
Ohh, you mean solutions for the trigonometric equation. I don't think you'll be marked down for that, no. I've never seen a mark scheme state you can't have any other solutions, I've seen mark schemes say ignore any other solutions outside the range. So I don't think you'll be marked down, as long as you have the correct solutions of course.
0
3 years ago
#3009
(Original post by lukass)
Can someone lease tell me how they solved

cos x + sin x 1
--------------- = ---
cos x - sin x 2

or am I just being a complete retard?
Cross multiply to get tanx=-1/3 and solve to get 2 answers common its just 4 marks
3
3 years ago
#3010
(Original post by Timotea)
How many question were??
9 questions
0
3 years ago
#3011
How many marks would I lose for not including asymptotes? (if any??)
0
3 years ago
#3012
(Original post by dominicwild)

You have a situation like that. The green line is the modded function.

It intercepts two versions of the curve, one being the normal and one being the . So, you just take the function, solve for x normally. Then take the negative of the function and solve for x again.
So basically solving:

I don't remember what the answers were though. But that's what I did. Pretty confident that's the correct working.
**** sake. the mod graph. I didnt complete it.. OMG!!..i only did before it touching the y axis. 1 mark lost
0
3 years ago
#3013
(Original post by lucymellor)
It isn't 1 less than -3 it's 2 less than -3 because you stretched the graph in the y axis by 2
Oh ****, so i actually got it correct?, what i wrote is what i thought after the exam when i thought i failed
0
3 years ago
#3014
(Original post by TheFuhrer)
its definitely decreasing
Its actually increasing
1
3 years ago
#3015
(Original post by Bustamove)
i'm not complaining on the difficulty.. I know I made a ton of silly mistakes and if I had more time, I could have done better...

I'm just sick of seeing people being arrogant to others or making fun of others on this thread who did not do as well... if you did well, then congrats, but there is no need to rub it in people's faces... it may seem like a joke to you but some people are actually scared/concerned about their future.
Well the point of the thread is for people to give their opinions about how they found the paper. We don't slack people when they say they found it really difficult, so then why do we do slack people when they find it easy?

Some people will do good, some will do bad. That's the nature of exams. A person who did good should have every right to boast about their exam as someone who did bad and complains.
0
3 years ago
#3016
arsey is online guys!!!

brace yourselves!!
0
3 years ago
#3017
Just like the paper, the hitler video is also moderately s****.

0
3 years ago
#3018
(Original post by sara_ara98)
looool sorry excuse me i just panicked
im sorry, wasnt my intention
0
3 years ago
#3019
(Original post by Ripper Phoenix)
increasing! K was negative in bold!
]
100% it was increasing from a negative and tending towards 0
0
3 years ago
#3020
(Original post by dominicwild)
Ohh, you mean solutions for the trigonometric equation. I don't think you'll be marked down for that, no. I've never seen a mark scheme state you can't have any other solutions, I've seen mark schemes say ignore any other solutions outside the range. So I don't think you'll be marked down, as long as you have the correct solutions of course.
okay thanks !!
0
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