Edexcel C2 20th May 2015 *Official Thread*

Original post by lulupixie

I'm doing so well 😂😂😂 that will be me after C2 as I have biology the next day then chemistry the day after that! I mean seriously who plans these things I mean why?! Bring on C2 revision tomorrow and chem and bio cramming 🙈

Yayyyy, I'm happy for you haha. 😂😂Lol, same!!! *Majortastic highfive*. Oh em gee, I know right.
BRANG UT UN..Cramming is the best.😂

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Reply 282

War-Mac

8

Original post by Columbo97

Guys take a look here, much more active thread.

Thanks

Reply 283

AJC1997

Guys, does anyone have some rules for the the questions where they ask you to solve for 0 < x < 360 and they give you 3sin(x+45) = 2 (for example)

I know how to do everything except the final part sometimes I get confused. I know it's 180 - x for Sin, 360 - x for Cos and 180 + x for Tan.

But in this example you do 180 - x which is fine, then minus 45 which is also fine.

But the other answer is 360 + x minus 45, why is it 360 + x is it just because 360 - x is for Cos? is there a set of rules for this?

(edited 8 years ago)

Reply 284

Original post by Anon_98

Yayyyy, I'm happy for you haha. 😂😂Lol, same!!! *Majortastic highfive*. Oh em gee, I know right.
BRANG UT UN..Cramming is the best.😂

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I crammed critics quotes for English this morning, I feel it might be the same with maths equations 😂🙈 how did you find C1?

Reply 285

War-Mac

8

Can someone tell me how to do all the stats stuff on the Casio fx-9750GII please.

Reply 286

frozo123

12

Original post by AJC1997

Guys, does anyone have some rules for the the questions where they ask you to solve for 0 < x < 360 and they give you 3sin(x+45) = 2 (for example)

I know how to do everything except the final part sometimes I get confused. I know it's 180 - x for Sin, 360 - x for Cos and 180 + x for Tan.

But in this example you do 180 - x which is fine, then minus 45 which is also fine.

But the other answer is 360 + x minus 45, why is it 360 + x is it just because 360 - x is for Cos? is there a set of rules for this?

First of all, draw a graph, to understand what you're actually doing, then you can just do it anyway without thinking too much, but still draw a graph anyway! or use a cast diagram but wouldn't recommend it. okay for this question let (x+45) equal a variable then sin(variable)=2/3 then inverse sin of 2/3 equals the variable, work it out. plug into variable, subtract 45

Reply 287

sami.k

Original post by AJC1997

Guys, does anyone have some rules for the the questions where they ask you to solve for 0 < x < 360 and they give you 3sin(x+45) = 2 (for example)

I know how to do everything except the final part sometimes I get confused. I know it's 180 - x for Sin, 360 - x for Cos and 180 + x for Tan.

But in this example you do 180 - x which is fine, then minus 45 which is also fine.

But the other answer is 360 + x minus 45, why is it 360 + x is it just because 360 - x is for Cos? is there a set of rules for this?

The way we do it is to as soon as u inverse the function, draw the CAST diagram and then u can see what the angles are and how to get to them and since u can only go one way round on CAST, then u can see how to work out the angles

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Reply 288

Original post by lulupixie

I crammed critics quotes for English this morning, I feel it might be the same with maths equations 😂🙈 how did you find C1?

Hahah, I think may friend may have done that exam- she found it awful. Ahhh no, hopefully not bahahah. Ah C1?.. Hm, well initially I thought it was okay but then I came onto student room and viewed Arsey's markscheme and ugh lol- the way I answered some questions just irritates me.😂What about yourself? :smile:

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Reply 289

sami.k

Original post by War-Mac

Can someone tell me how to do all the stats stuff on the Casio fx-9750GII please.

To get to the stat table in which u can insert ur x and y values and use various functions to calculate different things, u do as follows
1-make sure ur in stat mode by pressing mode setup and selecting the stat option 2-then select the function A+BX
3-insert ur x and y values accordingly
4-then, once uv inserted all ur values, press AC-this is highly important
5-now press shift then 1 and to calculate sum select the sum option
6-and select the according function
-then repeat step 5 until ur screen is displaying the formula u require
8-now press enter and eh voila!

Hope this helps :getmecoat:

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Reply 290

Original post by Anon_98

Hahah, I think may friend may have done that exam- she found it awful. Ahhh no, hopefully not bahahah. Ah C1?.. Hm, well initially I thought it was okay but then I came onto student room and viewed Arsey's markscheme and ugh lol- the way I answered some questions just irritates me.😂What about yourself? :smile:

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Same I was poodling through it without a problem, spoke to my friends and saw the unofficial mark scheme and saw how many stupid mistakes I made which could have easily got me more marks! So annoyed 😫

Reply 291

Original post by lulupixie

Same I was poodling through it without a problem, spoke to my friends and saw the unofficial mark scheme and saw how many stupid mistakes I made which could have easily got me more marks! So annoyed 😫

That pretty much described me haha!!- Hoping C2 will be better, what do you do as your chosen unit?

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Reply 292

Supermanxxxxxx

5

ImageUploadedByStudent Room1431718400.918648.jpg

Q3 I can't do it all otherwise got full marks

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Reply 293

Craig1998

12

Original post by Myst0x

answer says for b 15.7

I'm confused shouldn't it be

Perimeter of triangle - perimeter sector

When they're asking for perimeter of R

It asks for the area.

Reply 294

Original post by Anon_98

That pretty much described me haha!!- Hoping C2 will be better, what do you do as your chosen unit?

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Sorry I'm not sure what you mean :/ we do stats as well if that's it? I don't do mechanics or any of that stuff 😂 my friend does further maths I would be dead now if I was her 😂

Reply 295

usmanzubair

3

Original post by Supermanxxxxxx

Q3 I can't do it all otherwise got full marks

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There is a que in the textbook very similar to this and I was confused too. I went to my maths sir and he said that they don't ask you to find the power of binomial it is a portion of C4..

Reply 296

Original post by lulupixie

Sorry I'm not sure what you mean :/ we do stats as well if that's it? I don't do mechanics or any of that stuff 😂 my friend does further maths I would be dead now if I was her 😂

Lol, yup that's what I meant.😂Bc I've talked to others here who do D1 too which sounds like death itself tbh. 😂
Hahah!! Further maths, oh not for me I dont think. But wooh!- I do S1 too.

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Reply 297