Hey there! Sign in to join this conversationNew here? Join for free
    • Thread Starter
    Offline

    0
    ReputationRep:
    ~SOLVED~


    Every time I try this I only get one of the correct solutions. Can you work it out please?



    can you please show me all of the working so I can understand where I went wrong.

    Thanks in advance

    Name:  ImageUploadedByStudent Room1364849472.734179.jpg
Views: 122
Size:  92.1 KB
    Offline

    11
    ReputationRep:
    (Original post by GreigM)
    Every time I try this I only get one of the correct solutions. Can you work it out please?



    can you please show me all of the working so I can understand where I went wrong.

    Thanks in advance
    What did you try?
    I dislike providing full solutions is all
    Offline

    21
    ReputationRep:
    I will throw in one formula to get you going and then work from there.

    Spoiler:
    Show
    Sin2(theta) + Cos2(Theta) = 1
    Offline

    11
    ReputationRep:
    (Original post by Scienceisgood)
    I will throw in one formula to get you going and then work from there.

    Spoiler:
    Show
    Sin2(theta) + Cos2(Theta) = 1
    I considered this but decided expressing it in harmonic form was a better method.
    Offline

    20
    ReputationRep:
    Wave Form can help:

    aCosx + bSinx can be rewritten as RCos( x - k )
    • Thread Starter
    Offline

    0
    ReputationRep:
    Name:  ImageUploadedByStudent Room1364849472.734179.jpg
Views: 122
Size:  92.1 KB

    This is my working if this is of any use to any of you.

    The range is from 0 to 2pie.
    Posted from TSR Mobile
    Offline

    11
    ReputationRep:
    (Original post by GreigM)
    Name:  ImageUploadedByStudent Room1364849472.734179.jpg
Views: 122
Size:  92.1 KB

    This is my working if this is of any use to any of you.

    The range is from 0 to 2pie.
    Posted from TSR Mobile
    (2Pi + 1.98) -4.07 is still in the specified range.
    EDIT: See post below - made an error
    • Thread Starter
    Offline

    0
    ReputationRep:
    (Original post by joostan)
    (2Pi + 1.98) -4.07 is still in the specified range.
    Would I not add the 4.07?


    Posted from TSR Mobile
    Offline

    11
    ReputationRep:
    (Original post by GreigM)
    Would I not add the 4.07?


    Posted from TSR Mobile
    You're quite right, I did this question using sin rather than cos and got a bit muddled
    Its: 1.98 + 4.07< 2Pi
    Offline

    0
    ReputationRep:
    Use the 1.98 you scored out it is actually in the boundaries


    This was posted from The Student Room's iPhone 4s app.
    • Thread Starter
    Offline

    0
    ReputationRep:
    (Original post by Jack--)
    Use the 1.98 you scored out it is actually in the boundaries


    This was posted from The Student Room's iPhone 4s app.

    Thanks. I just noticed that a few minutes ago.
 
 
 
Poll
Do you agree with the PM's proposal to cut tuition fees for some courses?
Applying to university

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.