Hey! Sign in to get help with your study questionsNew here? Join for free to post

FP3 Polar Co-ordinates - Help Please !!

Announcements Posted on
Fancy a fiver? Fill in our quick survey and we’ll send you a £5 Amazon voucher 03-05-2016
Talking about ISA/EMPA specifics is against our guidelines - read more here 28-04-2016
  1. Offline


    Q 5bi and 5bii on page 52 please, I got the rest correct.

    I know I am expected to show some working before asking for help, but I am completely stumped by how I am to prove AB is a constant and then find a polar equation for M (mid point of AB).

  2. Online

    perhaps this might help....
    Attached Files
  3. File Type: pdf Polar Coordinates Problem.pdf (34.6 KB, 51 views)
  4. Offline

    (Original post by mikelbird)
    perhaps this might help....

    One thing, I don't get how BO =  a(1+\cos (\pi + \phi)).
  5. Online

    (Original post by member910132)

    One thing, I don't get how BO =  a(1+\cos (\pi + \phi)).
    Because AB is a straight line going through O so if the angle for OA is phi radians then surely the angle for B is phi plus pi radians....OK!!
  6. Offline

    I thought it would be pi take phi if it's on the other side of the straight line.

    This was posted from The Student Room's iPhone/iPad App
  7. Online

    OK..written in a hurry but cos phi minus pi is also minus cos phi so the result stands...sorry about the confusion
  8. Offline

    (Original post by mikelbird)
    OK..written in a hurry but cos phi minus pi is also minus cos phi so the result stands...sorry about the confusion
    Np, I appreciate you going out your way to make the pdf and your time


Submit reply


Thanks for posting! You just need to create an account in order to submit the post
  1. this can't be left blank
    that username has been taken, please choose another Forgotten your password?
  2. this can't be left blank
    this email is already registered. Forgotten your password?
  3. this can't be left blank

    6 characters or longer with both numbers and letters is safer

  4. this can't be left empty
    your full birthday is required
  1. Oops, you need to agree to our Ts&Cs to register
  2. Slide to join now Processing…

Updated: May 18, 2012
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.

Today on TSR

CIE maths exam

How did it go?

How often are people with Asthma hospitalised in the UK?
Useful resources

Make your revision easier


Maths Forum posting guidelines

Not sure where to post? Read here first


How to use LaTex

Writing equations the easy way

Student revising

Study habits of A* students

Top tips from students who have already aced their exams

Study Planner

Create your own Study Planner

Never miss a deadline again

Polling station sign

Thinking about a maths degree?

Chat with other maths applicants

Can you help? Study help unanswered threads

Groups associated with this forum:

View associated groups
Study resources
Quick reply
Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.