Hey there! Sign in to join this conversationNew here? Join for free
x Turn on thread page Beta
    • Thread Starter
    Offline

    3
    ReputationRep:
    Please could some one check this
    Attached Images
     
    Offline

    1
    ReputationRep:
    Check what?


    Posted from TSR Mobile
    • Very Important Poster
    Offline

    21
    ReputationRep:
    Very Important Poster
    (Original post by meme12)
    x
    Remember that (x^c)^2 = ...

    And think about where this applies in your calculations.
    Offline

    19
    ReputationRep:
    (Original post by meme12)
    Please could some one check this
    squaring eis ei2θ and not what you wrote there
    • Thread Starter
    Offline

    3
    ReputationRep:
    (Original post by TeeEm)
    squaring eis ei2θ and not what you wrote there


    Yes you are right , how do I get that is equal to one any idea
    Offline

    19
    ReputationRep:
    ei2θ = cos2θ + isin2θ
    • Thread Starter
    Offline

    3
    ReputationRep:
    What I did so far is right if e^2iphi is equal to one
    Offline

    19
    ReputationRep:
    (Original post by meme12)
    What I did so far is right if e^2iphi is equal to one
    ei2θ = cos2θ + isin2θ
    • Thread Starter
    Offline

    3
    ReputationRep:
    Tee can you send me the site address , mad for math .
    Offline

    2
    ReputationRep:
    (a+b)^2= a^2+2ab+b^2
    Offline

    19
    ReputationRep:
    (Original post by meme12)
    Tee can you send me the site address , mad for math .
    look in my profile
    Offline

    19
    ReputationRep:
    (Original post by meme12)
    Tee can you send me the site address , mad for math .
    sorry I was busy earlier

    there are 2 mistakes

    cosθ =1/2[ e +e-iθ]
    sinθ =1/(2i)[ e - e-iθ]

    and

    [e]2 is ei2θ and not what you wrote there
    • Thread Starter
    Offline

    3
    ReputationRep:
    It's ok , I did still didn't make difference , I have to try different way I think , I couldn't find that site in your profile .
    Offline

    19
    ReputationRep:
    (Original post by meme12)
    It's ok , I did still didn't make difference , I have to try different way I think , I couldn't find that site in your profile .
    http://madasmaths.com/
    Offline

    11
    ReputationRep:
    some very nice resources there. Many thanks for sharing.
    Offline

    19
    ReputationRep:
    (Original post by dpm)
    some very nice resources there. Many thanks for sharing.
    thank you
    • Thread Starter
    Offline

    3
    ReputationRep:
    Yes I find it very useful thx.
 
 
 
Reply
Submit reply
Turn on thread page Beta
Updated: October 18, 2015
Poll
Do you agree with the proposed ban on plastic straws and cotton buds?
Useful resources

Make your revision easier

Maths

Maths Forum posting guidelines

Not sure where to post? Read the updated guidelines here

Equations

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

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

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