# Edexcel A2 C3 Mathematics 12th June 2015Watch

This discussion is closed.
3 years ago
#2141
(Original post by studentwiz)
thank you, there was 4 answers for that question btw
ye i posted them all in the first post
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3 years ago
#2142
(Original post by Freddy-Francis)
then u did something wrong

I hope edexcel wont do that
Ok great thanx!- good luck everyone. Is the quotient rule udv+ vdu we don't use the official terms

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3 years ago
#2143
Best of luck to everyone!!
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3 years ago
#2144
Who else is jumping on this thread straight away after the exam? :3
1
3 years ago
#2145
(Original post by sorarosa1998)
Ok great thanx!- good luck everyone. Is the quotient rule udv+ vdu we don't use the official terms

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ye
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3 years ago
#2146
Good luck everyone

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3 years ago
#2147
(Original post by sorarosa1998)
Like when I compare coefficients one answer is minus? Then it will be tan -x/y
Usually it's plus never came across a minus but askin jic

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i dont think you use the negative sign
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3 years ago
#2148
(Original post by hajs)
Best of luck to everyone!!
Good Luck

(Original post by LukeTownsend123)
Who else is jumping on this thread straight away after the exam? :3
Ofcourse
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3 years ago
#2149
https://07a69ccf283966549a9350d1a669...%20Edexcel.pdf

Can someone help me with 7b pleeease
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3 years ago
#2150
Arsey will probably have the solutions up at around 12/1ish today probably as there are no other exams for Maths Edexcel taking place!!! GOD SAVE ARSEY!
2
3 years ago
#2151
(Original post by Maham88)
i dont think you use the negative sign
You will use the negative sign if, when you compare coefficients, they don't cancel.

I.e.

2cosx + 5 sin x = Rcosxcos(alpha) - Rsinxsin(alpha)

2 = Rcos(alpha)
5 = -Rsin(alpha)

Doubt they'll do that though...

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3 years ago
#2152
I'm starting to really panic
I know that I find C3 easy and I should be getting 95+ ums but I'm psyching myself out big time :-( :-(
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3 years ago
#2153
(Original post by Kingnig)
https://07a69ccf283966549a9350d1a669...%20Edexcel.pdf

Can someone help me with 7b pleeease
You know that the y=cosx graph crosses the x axis at pi/2 and 3pi/2. You are dealing with the graph of Rcos(x-alpha), which is a translation of alpha units to the right. As a result, you just add alpha to pi/2 and 3pi/2 to find where it crosses the x axis.

For the y-axis, you know that x=0, so just sub that in into your equation and see what you get

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3 years ago
#2154
Guys, I know how to answer every question, but I make really stupid small mistakes that cost me several marks each papers and sometimes take me below the A* boundary... Any advice to stop this please?
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3 years ago
#2155
good luck everyone
0
3 years ago
#2156
(Original post by anonwinner)
Guys, I know how to answer every question, but I make really stupid small mistakes that cost me several marks each papers and sometimes take me below the A* boundary... Any advice to stop this please?
Take deep breaths
1
3 years ago
#2157
(Original post by anonwinner)
Guys, I know how to answer every question, but I make really stupid small mistakes that cost me several marks each papers and sometimes take me below the A* boundary... Any advice to stop this please?
Just try to keep your focus. If you have much time at the end go through as many questions as you can to root out any mistakes you've made, if any. Best of luck to you!
0
3 years ago
#2158
(Original post by kingaaran)
You know that the y=cosx graph crosses the x axis at pi/2 and 3pi/2. You are dealing with the graph of Rcos(x-alpha), which is a translation of alpha units to the right. As a result, you just add alpha to pi/2 and 3pi/2 to find where it crosses the x axis.

For the y-axis, you know that x=0, so just sub that in into your equation and see what you get

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Ahhhh thanks a lot dude, good luck!
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3 years ago
#2159
(Original post by anonwinner)
Guys, I know how to answer every question, but I make really stupid small mistakes that cost me several marks each papers and sometimes take me below the A* boundary... Any advice to stop this please?
I have the same problem, I find taking my time and ensuring time to check at the end is helpful to spot these mistakes and correct them however time is already limited so its a difficult issue to solve.
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3 years ago
#2160
(Original post by rachelc142)
I'm starting to really panic
I know that I find C3 easy and I should be getting 95+ ums but I'm psyching myself out big time :-( :-(
I have that feeling
FP2 was fine and yet I'm terrified of messing up C3; it would look rather funny to have a better grade in further maths than maths..
0
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