Join TSR now and get all your revision questions answeredSign up now

Can you help me with this matrix

    • Thread Starter
    Offline

    1
    ReputationRep:
    http://integralmaths.org/pluginfile..../0/fp1mass.pdf
    i dont get 1 at all . i dont know how to work out around what point it turns
    Offline

    3
    ReputationRep:
    Matrix123 Can you help?
    Offline

    3
    ReputationRep:
    (Original post by Boss_Rhythm)
    Matrix123 Can you help?
    Haha thanks for the tag Rhythm
    (Original post by HideyoKids)
    http://integralmaths.org/pluginfile..../0/fp1mass.pdf
    i dont get 1 at all . i dont know how to work out around what point it turns
    I'm afraid I haven't done FP1 yet, but you'd have to use a coordinate and multiply it by the matrix and compare it to the new coordinates to determine the centre and angle of rotation, I think. Using a couple of points could help to find this I'd imagine.

    You can use coordinates like (0,1) and (0,-1) as reflected points in the x axis to help find the matrix in part b?

    As I said, I haven't done FP1 yet so that's just what I'd attempt, looking at that question.

    Tagging the first people who come to mind who may help:
    Zacken RDKGames Ayaz789
    Offline

    3
    ReputationRep:
    SeanFM Can you help out? I've forgotten :lol:
    Offline

    3
    ReputationRep:
    (Original post by HideyoKids)
    http://integralmaths.org/pluginfile..../0/fp1mass.pdf
    i dont get 1 at all . i dont know how to work out around what point it turns
    It's just the standard rotation matrix  \begin{pmatrix} \cos \theta & -\sin \theta \\ \sin \theta & \cos \theta \end{pmatrix} which is of course a rotation about the origin.
    Offline

    3
    ReputationRep:
    alow Any ideas?
    Offline

    3
    ReputationRep:
    (Original post by HideyoKids)
    http://integralmaths.org/pluginfile..../0/fp1mass.pdf
    i dont get 1 at all . i dont know how to work out around what point it turns
    (Original post by Matrix123)
    Haha thanks for the tag Rhythm

    I'm afraid I haven't done FP1 yet, but you'd have to use a coordinate and multiply it by the matrix and compare it to the new coordinates to determine the centre and angle of rotation, I think. Using a couple of points could help to find this I'd imagine.

    You can use coordinates like (0,1) and (0,-1) as reflected points in the x axis to help find the matrix in part b?

    As I said, I haven't done FP1 yet so that's just what I'd attempt, looking at that question.

    Tagging the first people who come to mind who may help:
    Zacken RDKGames Ayaz789
    As said by B_9710, it is a rotation around the origin by whatever angle you work it out to be. It is worth to keep note that when dealing with matrices, all the transformations which you perform happen relative to the origin, therefore the origin is the only point which does not change!
 
 
 
Poll
Which party will you be voting for in the General Election 2017?
Help with your A-levels

All the essentials

The adventure begins mug

Student life: what to expect

What it's really like going to uni

Rosette

Essay expert

Learn to write like a pro with our ultimate essay guide.

Uni match

Uni match

Our tool will help you find the perfect course for you

Study planner

Create a study plan

Get your head around what you need to do and when with the study planner tool.

Study planner

Resources by subject

Everything from mind maps to class notes.

Hands typing

Degrees without fees

Discover more about degree-level apprenticeships.

A student doing homework

Study tips from A* students

Students who got top grades in their A-levels share their secrets

Study help links and info

Can you help? Study help unanswered threadsRules and posting guidelines

Sponsored content:

HEAR

HEAR

Find out how a Higher Education Achievement Report can help you prove your achievements.

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

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