You are Here: Home >< Maths

# Edexcel C2 20th May 2015 *Official Thread* watch

I DONT HAVE A SPARE CALCULATOR
And... I'm going to school like 20 minutes earlier to buy another one because I'm panicking

Posted from TSR Mobile
2. CAN ANYONE TELL ME WHEN YOU USE THE rtheta equation or the other arc lengtH equation...there are two formulas for arc length right? I don't know how to use the second one and when you use it, HELP!!!! AND WHAT IS THE FORMULA FOR IT???
3. (Original post by frances98)
And... I'm going to school like 20 minutes earlier to buy another one because I'm panicking

Posted from TSR Mobile
What's wrong with your current one?

Posted from TSR Mobile
4. (Original post by Sam_the-man)
Thanks man
Area of segment =
1/2*r^2*(theta -sintheta)

Posted from TSR Mobile
5. (Original post by Olon)
CAN ANYONE TELL ME WHEN YOU USE THE rtheta equation or the other arc lengtH equation...there are two formulas for arc length right? I don't know how to use the second one and when you use it, HELP!!!! AND WHAT IS THE FORMULA FOR IT???
I DIDNT KNOW THERE WAS A SECOND FORMULA¿!?!??

I'm pretty sure its just rtheta to find the arc length...just one formula? I thought there was just the one.

Posted from TSR Mobile
6. (Original post by Columbo97)
Considering people have been requesting a thread.

Edexcel C2 - Wednesday 20th May 2015

Hopefully this thread will motivate us all, and help us to achieve the grades we deserve.

Specification - http://qualifications.pearson.com/co...hs_Issue_3.pdf
Formula Booklet - http://www.edexcel.com/migrationdocu...cal-Tables.pdf
Offical Past Papers - http://www.mathspapers.co.uk/edexcel.html

Examsolutions - www.examsolutions.net
Maths247 - www.m4ths.com

If you have any other websites you'd like to add, post them below and I'll edit this post.
The specification wont work for me dk y
7. (Original post by physicsmaths)
If they say find the area yes give the abosolute answer. If they evaluate the integral blah then give whatever cones out of the integral. Remember peopke that the calc can check ur answers!!

Posted from TSR Mobile
ok so ALL area questions are absolute value. thanks
8. (Original post by Olon)
CAN ANYONE TELL ME WHEN YOU USE THE rtheta equation or the other arc lengtH equation...there are two formulas for arc length right? I don't know how to use the second one and when you use it, HELP!!!! AND WHAT IS THE FORMULA FOR IT???
When you have the radius of a circle and angle IN RADIANS

Posted from TSR Mobile
9. and my calculator can'#t do differentiation. so ill hvae to freestyle things
10. (Original post by dripper)
and my calculator can'#t do differentiation. so ill hvae to freestyle things
Cacylators that do diff are not allowed.
Thats wjat i was told

Posted from TSR Mobile
11. (Original post by Olon)
CAN ANYONE TELL ME WHEN YOU USE THE rtheta equation or the other arc lengtH equation...there are two formulas for arc length right? I don't know how to use the second one and when you use it, HELP!!!! AND WHAT IS THE FORMULA FOR IT???
You have L = r*Theta
Area of sector = 0.5*r^2*Theta
Area of segment = 0.5*r^2(Theta-sin(Theta)
12. (Original post by Olon)
CAN ANYONE TELL ME WHEN YOU USE THE rtheta equation or the other arc lengtH equation...there are two formulas for arc length right? I don't know how to use the second one and when you use it, HELP!!!! AND WHAT IS THE FORMULA FOR IT???
There's another formula if the angle is in degrees, but they like to test your radians ability in C2, and I've never seen it be given in degrees, so you should be find to just know the radians equation
13. (Original post by a.a.k)
When you have the radius of a circle and angle IN RADIANS

Posted from TSR Mobile
Noooo, i mean when do you use r(2theta-angle)
14. I really hope its not gonna be the R paper I feel like im ready for this exam but then i dont want to do it
15. (Original post by Olon)
r(2theta-angle)

What is that
Posted from TSR Mobile
16. (Original post by frances98)
And... I'm going to school like 20 minutes earlier to buy another one because I'm panicking

Posted from TSR Mobile
OUR SCHOOL DOESNT SELL CALCULATORS AND I DONT HAVE TIME TO GO TO STAPLES TO GET ONE AHHHHHHh
17. (Original post by Olon)
Noooo, i mean when do you use r(2theta-angle)
area of a sector = A x 1/2 x r^2 (thera - sin(thera) *i think*
18. (Original post by VyteJan)
area of a sector
Area of sector is 1/2*r^2*theta

Posted from TSR Mobile
19. when finding area between a line and a curve is it better to make a shape and substract them or intergrate them by taking the lines away? hope that makes sense
20. (Original post by a.a.k)
Area of sector is 1/2*r^2*theta

Posted from TSR Mobile
Yea, thats what i meant x'D thx

### Related university courses

TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

This forum is supported by:
Updated: May 15, 2017
Today on TSR

### Edexcel C4 Maths Unofficial Markscheme

Find out how you've done here

### 1,568

students online now

Exam discussions

### Find your exam discussion here

Poll
Useful resources

Can you help? Study help unanswered threadsStudy Help rules and posting guidelinesLaTex guide for writing equations on TSR

## Groups associated with this forum:

View associated groups

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE