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

    0
    ReputationRep:
    Three points A, B and C lie on a level plane.
    B is 7 km from A on a bearing of 030°.
    C is 5 km from B on a bearing of 280°.
    i) Find the distance AC.
    ii) Find the bearing of A from C
    iii) Find the area of triangle ABC
    (Give all answers correct to 3 significant figures)
    I think number ii) is incorrect? Can someone please explain how to do these questions I have no idea.
    Attached Images
     
    Offline

    14
    ReputationRep:
    sine and cosine rule is relevant
    you just need to choose which one is relevant to this question
    Spoiler:
    Show
    but i am not sure SURE
    Offline

    1
    ReputationRep:
    (Original post by fatima1998)
    sine and cosine rule is relevant
    you just need to choose which one is relevant to this question
    Spoiler:
    Show
    but i am not sure SURE
    thanks ❤•.¸✿¸.• 𝓢𝓽𝓾𝓭𝔂 ℋ𝒆𝓵𝓹𝒆𝓻 •.¸✿¸.•❤
    Offline

    14
    ReputationRep:
    (Original post by ❤✿𝓢𝓽𝓾𝓭𝔂 ℋ𝒆𝓵𝓹𝒆𝓻✿❤)
    thanks ❤•.¸✿¸.• 𝓢𝓽𝓾𝓭𝔂 ℋ𝒆𝓵𝓹𝒆𝓻 •.¸✿¸.•❤
    Offline

    17
    ReputationRep:
    (Original post by Marmite170899)
    Three points A, B and C lie on a level plane.
    B is 7 km from A on a bearing of 030°.
    C is 5 km from B on a bearing of 280°.
    i) Find the distance AC.
    ii) Find the bearing of A from C
    iii) Find the area of triangle ABC
    (Give all answers correct to 3 significant figures)
    I think number ii) is incorrect? Can someone please explain how to do these questions I have no idea.
    look at your diagram again, you have done a bearing of 060

    also from B to C, that isn't how you do the bearing. Always start looking north (ie up to page) and go clockwise

    Edit: re-reading this it sounds very rude, i didn't mean that way, sorry
    Offline

    18
    ReputationRep:
    too late ...
    • Thread Starter
    Offline

    0
    ReputationRep:
    (Original post by DylanJ42)
    look at your diagram again, you have done a bearing of 060

    also from B to C, that isn't how you do the bearing. Always start looking north (ie up to page) and go clockwise

    Edit: re-reading this it sounds very rude, i didn't mean that way, sorry
    I agree with you and I have tried the other way too, but I am still confused.
    Offline

    17
    ReputationRep:
    (Original post by Marmite170899)
    I agree with you and I have tried the other way too, but I am still confused.
    Name:  work.jpg
Views: 52
Size:  84.5 KB

    from 0-10, how much sense does this make to you?

    could you finish it from here do you think?

    as someone above said, its all about sin and cos rules
    • Thread Starter
    Offline

    0
    ReputationRep:
    (Original post by DylanJ42)
    Name:  work.jpg
Views: 52
Size:  84.5 KB

    from 0-10, how much sense does this make to you?

    could you finish it from here do you think?

    as someone above said, its all about sin and cos rules
    I would give it an 8. Thank you I understand it much more now.
    Offline

    17
    ReputationRep:
    (Original post by Marmite170899)
    I would give it an 8. Thank you I understand it much more now.
    8/10 is not too bad just practice lots of them and that will be 10/10 in no time its no problem
 
 
 
  • See more of what you like on The Student Room

    You can personalise what you see on TSR. Tell us a little about yourself to get started.

  • Poll
    Brussels sprouts
    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
  • See more of what you like on The Student Room

    You can personalise what you see on TSR. Tell us a little about yourself to get started.

  • 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.