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Edexcel A2 C3 Mathematics 12th June 2015

Reply 2140

Freddy-Francis

9

Original post by studentwiz

thank you, there was 4 answers for that question btw

ye i posted them all in the first post

Reply 2141

sorarosa1998

1

Original post by Freddy-Francis

then u did something wrong :biggrin:

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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Reply 2142

hajs

11

Best of luck to everyone!! :h:

Reply 2143

LukeTownsend123

2

Who else is jumping on this thread straight away after the exam? :3

Reply 2144

Freddy-Francis

9

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

Reply 2145

User1686961

12

Good luck everyone :smile:

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Reply 2146

Maham88

2

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

Reply 2147

Freddy-Francis

9

Original post by hajs

Best of luck to everyone!! :h:

Good Luck

Original post by LukeTownsend123

Who else is jumping on this thread straight away after the exam? :3

Ofcourse

Reply 2148

Kingnig

1

https://07a69ccf283966549a9350d1a66951a7bc96e2dc.googledrive.com/host/0B1ZiqBksUHNYZ0JQM1NRcmdHdXM/June%202014%20(R)%20QP%20-%20C3%20Edexcel.pdf

Can someone help me with 7b pleeease :smile:

Reply 2149

LukeTownsend123

2

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!

Reply 2150

crashMATHS

16

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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(edited 8 years ago)

Reply 2151

rachelc142

11

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 :-( :-(

Reply 2152

crashMATHS

16

Original post by Kingnig

https://07a69ccf283966549a9350d1a66951a7bc96e2dc.googledrive.com/host/0B1ZiqBksUHNYZ0JQM1NRcmdHdXM/June%202014%20(R)%20QP%20-%20C3%20Edexcel.pdf

Can someone help me with 7b pleeease :smile:

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 :smile:

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Reply 2153

anonwinner

19

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?

good luck everyone

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 :biggrin:

Reply 2156

Jack_Linaker

1

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!

Reply 2157

Kingnig

1

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 :smile:

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Ahhhh thanks a lot dude, good luck! :smile:

Reply 2158

phoebs_ox

1

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.

Reply 2159

math42

20

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..

Edexcel A2 C3 Mathematics 12th June 2015

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