Turn on thread page Beta
    • Thread Starter
    Offline

    0
    ReputationRep:
    Hi, i'm really struggling with this maths homework on trigonometry in 3D shapes..take a look at it a see if u get it, because i really don't!
    Here's the link:

    http://www.havering-sfc.ac.uk/owa/We...rUDSi&attcnt=1

    Thanks for any help you give me
    Offline

    0
    ReputationRep:
    post the question
    • Thread Starter
    Offline

    0
    ReputationRep:
    (Original post by Pheylan)
    post the question

    http://www.havering-sfc.ac.uk/owa/We...rUDSi&attcnt=1

    Thanks
    Offline

    14
    ReputationRep:
    You need a password to see it.
    Offline

    3
    ReputationRep:
    I can't see the question because I'm being asked for extranet authentication
    • Thread Starter
    Offline

    0
    ReputationRep:
    (Original post by maxfire)
    You need a password to see it.
    ok its a bit dodgy, my teacher put it on adobe reader...
    Attached Images
  1. File Type: pdf IB_Trigonometry_Homework_2.pdf (46.1 KB, 123 views)
    • Thread Starter
    Offline

    0
    ReputationRep:
    (Original post by ian.slater)
    I can't see the question because I'm being asked for extranet authentication
    this should work
    Attached Images
  2. File Type: pdf IB_Trigonometry_Homework_2.pdf (46.1 KB, 74 views)
    Offline

    14
    ReputationRep:
    (Original post by iffi)
    Hi, i'm really struggling with this maths homework on trigonometry in 3D shapes..take a look at it a see if u get it, because i really don't!
    Here's the link:

    http://www.havering-sfc.ac.uk/owa/We...rUDSi&attcnt=1

    Thanks for any help you give me
    Why don't you upload your document using the facilities on this site?

    • Thread Starter
    Offline

    0
    ReputationRep:
    (Original post by steve2005)
    Why don't you upload your document using the facilities on this site?

    Ok, im sorry..heres the file..i'm hopeless with this stuff.
    Attached Images
  3. File Type: pdf IB_Trigonometry_Homework_2.pdf (46.1 KB, 502 views)
    Offline

    0
    ReputationRep:
    Hints for first question:

    (a) Use Pythagora's theorem
    (b) Cos(x) = adjacent / hypotenuse
    (c) Degrees in a circle: 360
    (d) AO = BO = 7, use answer to (c) and cosine rule
    • Thread Starter
    Offline

    0
    ReputationRep:
    (Original post by xXx_pUnK_pOp_pRiNcEsS_xXx)
    Hints for first question:

    (a) Use Pythagora's theorem
    (b) Cos(x) = adjacent / hypotenuse
    (c) Degrees in a circle: 360
    (d) AO = BO = 7, use answer to (c) and cosine rule
    Omg thanks for this!
    Offline

    21
    (Original post by iffi)
    Omg thanks for this!
    You're welcome.
    Offline

    15
    ReputationRep:
    i)
    a) Think pythagoras. You have a triangle with 2 known lengths.
    b) Think SOHCAHTOA.
    c) A, B, and C are equally spaced across the circumference of the circle, as stated in the question.
    d) Using part c), and the fact that the radius of the circle is 7, you can find AB using the cosine rule.
    e) Repeat part d), except now you have 3 sides, and need an angle.

    ii)
    a) Again, pythagoras.
    b) Cosine rule. You have 3 sides.
    c) You have 2 smaller rectangles, and 4 larger. You need to work out the length AB (= DC, EF, HG).
    d) I can't really visualise the shape, but I think it's just the cuboid cut in half. Maybe not though.
    • Thread Starter
    Offline

    0
    ReputationRep:
    (Original post by AnonyMatt)
    i)
    a) Think pythagoras. You have a triangle with 2 known lengths.
    b) Think SOHCAHTOA.
    c) A, B, and C are equally spaced across the circumference of the circle, as stated in the question.
    d) Using part c), and the fact that the radius of the circle is 7, you can find AB using the cosine rule.
    e) Repeat part d), except now you have 3 sides, and need an angle.

    ii)
    a) Again, pythagoras.
    b) Cosine rule. You have 3 sides.
    c) You have 2 smaller rectangles, and 4 larger. You need to work out the length AB (= DC, EF, HG).
    d) I can't really visualise the shape, but I think it's just the cuboid cut in half. Maybe not though.
    Thank you
 
 
 
Reply
Submit reply
Turn on thread page Beta
Updated: January 26, 2010

University open days

  • Sheffield Hallam University
    City Campus Postgraduate
    Wed, 17 Oct '18
  • Staffordshire University
    Nursing and Midwifery Undergraduate
    Wed, 17 Oct '18
  • Teesside University
    Undergraduate open day Undergraduate
    Wed, 17 Oct '18
Poll
Who is most responsible for your success at university
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

Equations

Best calculators for A level Maths

Tips on which model to get

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.