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# Help! I suck at maths!!! watch

1. 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
2. post the question
3. (Original post by Pheylan)
post the question

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

Thanks
4. You need a password to see it.
5. I can't see the question because I'm being asked for extranet authentication
6. (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
7. IB_Trigonometry_Homework_2.pdf (46.1 KB, 123 views)
8. (Original post by ian.slater)
I can't see the question because I'm being asked for extranet authentication
this should work
Attached Images
9. IB_Trigonometry_Homework_2.pdf (46.1 KB, 74 views)
10. (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?

11. (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
12. IB_Trigonometry_Homework_2.pdf (46.1 KB, 502 views)
13. 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
14. (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!
15. (Original post by iffi)
Omg thanks for this!
You're welcome.
16. 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.
17. (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

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