Join TSR now and get all your revision questions answeredSign up now
    • Welcome Squad
    Offline

    14
    ReputationRep:
    (Original post by Revisionbug)
    Hahaha its possible as am doing **** all atm tbh im not trying much for c4 as after my c3 my chances for the grade i need are so dire but since theres stilk a 1% chance so i should start i guess i dont want regrets after tuesday an all nighter and a full day coming right up! Should be fun
    Have you had any sleep so far?
    Offline

    0
    ReputationRep:
    (Original post by SortYourLife)
    Yeah aha it's just a camp rock notebook I bought years ago and have for scrap paper ahah :')


    Posted from TSR Mobile
    Still love camp rock till this day!


    Posted from TSR Mobile
    Offline

    2
    ReputationRep:
    Name:  ImageUploadedByStudent Room1371427966.972063.jpg
Views: 146
Size:  127.7 KB
    Hi everyone, could anyone please help me to evaluate question (g) ? As I did attach it in this post. I don't think normal paper would have this, but just wanna be prepared after c3 shocked!! Thank you very much in advance!!!


    Posted from TSR Mobile
    Offline

    1
    ReputationRep:
    (Original post by Fortitude)
    Have you had any sleep so far?
    Yeah but i think il sleep 2-3hrs and just do c4 tomorow i should b ready for tuesday hopefuly by then iv done alot less past papers opposed to c3 just harder topic based questions
    • Welcome Squad
    Offline

    14
    ReputationRep:
    (Original post by Revisionbug)
    Yeah but i think il sleep 2-3hrs and just do c4 tomorow i should b ready for tuesday hopefuly by then iv done alot less past papers opposed to c3 just harder topic based questions
    Yeah because you need sleep anyway, to remember stuff. I'm in the same boat as you, I still can't believe I did so many papers yet still But anyway get some sleep so that you can have a productive day & Good Luck!
    Offline

    0
    ReputationRep:
    (Original post by Myda)
    Hey, could someone please explain Q20 from Review exercise C4 book. I'm not sure how you would get a.b from the info given! Thanks
    cosine rule?
    Offline

    6
    ReputationRep:
    Those who want challenging vector questions- check AEA.
    Offline

    0
    ReputationRep:
    (Original post by MAD Phil)
    cosine rule?
    How though?? When you don't know the angle.

    You are only given the modulus of a and modulus of b. also you at given the modulus of b- a. How can you find a. B from that ? Explain yourself please


    Posted from TSR Mobile
    Offline

    14
    ReputationRep:
    (Original post by orange94)
    Still love camp rock till this day!


    Posted from TSR Mobile
    May have to give it a cheeky watch once Thursday is over... Last exam woop


    Posted from TSR Mobile
    Offline

    2
    ReputationRep:
    (Original post by orange94)
    How though?? When you don't know the angle.

    You are only given the modulus of a and modulus of b. also you at given the modulus of b- a. How can you find a. B from that ? Explain yourself please


    Posted from TSR Mobile
    Man that was tricky...

    Sub the 16s

    Posted from TSR Mobile
    Attached Images
     
    Offline

    14
    ReputationRep:
    (Original post by May-o2q)
    Name:  ImageUploadedByStudent Room1371427966.972063.jpg
Views: 146
Size:  127.7 KB
    Hi everyone, could anyone please help me to evaluate question (g) ? As I did attach it in this post. I don't think normal paper would have this, but just wanna be prepared after c3 shocked!! Thank you very much in advance!!!


    Posted from TSR Mobile
    Here ya go Name:  ImageUploadedByStudent Room1371431470.174758.jpg
Views: 84
Size:  144.3 KB


    Posted from TSR Mobile
    Offline

    0
    ReputationRep:
    (Original post by cooldudeman)
    Man that was tricky...

    Sub the 16s

    Posted from TSR Mobile
    how the hell did you manage that
    Offline

    2
    ReputationRep:
    (Original post by yaboy)
    how the hell did you manage that
    I was in the hyperbolic time chamber for some time.

    Posted from TSR Mobile
    Offline

    11
    ReputationRep:
    (Original post by «WD»ddd)
    We will rape this paper.. who's with me?
    ...I think you're on your own there, mate...
    Offline

    0
    ReputationRep:
    (Original post by orange94)
    How though?? When you don't know the angle.

    You are only given the modulus of a and modulus of b. also you at given the modulus of b- a. How can you find a. B from that ? Explain yourself please


    Posted from TSR Mobile
    Form a triangle OAB with vector OA = a and OB = b as two adjacent sides; then AB = b - a is the third side. Apart from that, you don't need any vector theory; just use cosine rule.

    EDIT: I mean The Cosine Rule as given in the C2 section of the formula book,

    a^2 = b^2 + c^2 - 2bc cos A

    not the formula

    a.b = ab cos theta

    where theta is to angle between vectors a and b.
    Offline

    11
    ReputationRep:
    Please someone help ME!!

    Solomon Paper G Question 5 part b...

    Name:  solomon paper q.JPG
Views: 165
Size:  30.5 KBName:  solomon paper a.JPG
Views: 135
Size:  20.8 KB

    So how did they calculate AC in part B? Why is it 3 x the gradient of the line that goes through AB? I thought AC could also just be C - A...

    Any form of help will be so greatly appreciated.
    Offline

    2
    ReputationRep:
    (Original post by SuziieB)
    Please someone help ME!!

    Solomon Paper G Question 5 part b...

    Name:  solomon paper q.JPG
Views: 165
Size:  30.5 KBName:  solomon paper a.JPG
Views: 135
Size:  20.8 KB

    So how did they calculate AC in part B? Why is it 3 x the gradient of the line that goes through AB? I thought AC could also just be C - A...

    Any form of help will be so greatly appreciated.
    If its a length, its just the difference in the numbers, then mod that ****.


    Posted from TSR Mobile
    Attached Images
     
    Offline

    1
    ReputationRep:
    (Original post by SuziieB)
    Please someone help ME!!

    Solomon Paper G Question 5 part b...

    Name:  solomon paper q.JPG
Views: 165
Size:  30.5 KBName:  solomon paper a.JPG
Views: 135
Size:  20.8 KB

    So how did they calculate AC in part B? Why is it 3 x the gradient of the line that goes through AB? I thought AC could also just be C - A...

    Any form of help will be so greatly appreciated.
    Well this is embarrassing... I got stuck on the first part

    I have no Idea How they made A->B = -9i + 12j - k

    How on earth is (4j+k) - (9i-8j+2k) = -9i + 12j - k

    surely its -5i + 8j -k

    :confused:
    Offline

    0
    ReputationRep:
    (Original post by SuziieB)
    Please someone help ME!!

    Solomon Paper G Question 5 part b...

    Name:  solomon paper q.JPG
Views: 165
Size:  30.5 KBName:  solomon paper a.JPG
Views: 135
Size:  20.8 KB

    So how did they calculate AC in part B? Why is it 3 x the gradient of the line that goes through AB? I thought AC could also just be C - A...

    Any form of help will be so greatly appreciated.
    This isnt really help, but I just thought I'd let you know that I was doing that question and did exactly what you did, I'm also confused as to why they did that.

    Getting really scared for c4 atm
    Offline

    0
    ReputationRep:
    (Original post by posthumus)
    Well this is embarrassing... I got stuck on the first part

    I have no Idea How they made A->B = -9i + 12j - k

    How on earth is (4j+k) - (9i-8j+2k) = -9i + 12j - k

    surely its -5i + 8j -k

    :confused:
    AB = OB - OA

    so (0,4,1) - (9,-8,2)
 
 
 
Poll
Which web browser do you use?

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.