Math O level

• redstone

  11 Nov 05, 23:22

  Originally posted by technoboy:

  One is bisect so = 28 deg.
  
  The other angle is alt. angles so also 28 deg.
  
  Therefore the triangle is an isosceles triange

  I can't see!!!!!
  
  Very dizzying!!!!!!!
  
  Like wanna sabo candidates liddat.
• snowiesnow

  11 Nov 05, 23:33

  haha ya 28 degree lai de..
  
  and the X is centre, using the
  angels at centre is x2 the angle of circumference
• boy in blues

  11 Nov 05, 23:43

  Originally posted by starblue:

  how to comfort him?? i'm in school.... i bet he's now playing the com.. -_-"""

  how?
• redstone

  12 Nov 05, 00:21

  Originally posted by boy in blues:

  how?

  Got many cases of people failing O level (touch wood)....
  Go ITE, then went poly, uni and in the end got Honours Degree.
• boy in blues

  12 Nov 05, 00:25

  Originally posted by redstone:

  Got many cases of people failing O level (touch wood)....
  Go ITE, then went poly, uni and in the end got Honours Degree.

  definitely.
  it takes a strong character though.
• DrTech

  12 Nov 05, 00:26

  Originally posted by snowiesnow:

  haha ya 28 degree lai de..
  
  and the X is centre, using the
  angels at centre is x2 the angle of circumference

  Interesting... I used the Right angle on circumference formed with the diameter. That one easier to prove
  
  Anyway, vectors was idiot-proof. Very difficult to make careless mistakes. The most is your explanation for 1 or 2 parts wrong...
  
  The graph... too much room for error la... But if you know how to differentiate... maybe your tangent 100% correct
• redstone

  12 Nov 05, 02:11

  For vectors, X Y Z how?
  
  And how many cars does each family own on average?
• finoq

  13 Nov 05, 10:11

  Originally posted by approximately89:

  answer for the numbers of toys to be made
  
  vol.of cone+hemisphere(toy)= (1/3 x pi x 5^2 x 12) + (2/3 x pi x 5^3)
  
  =575.9 cm^3(round up to 576cm^3)
  
  vol. of metal cylinder= pi x (150)^2 x 200
  = 14137166.9cm^3 (round up to 14137167cm^3)
  
  therefore : numbers of toys made = 14137167cm^3 divide 576cm^3
  = 24543.69 (round up to 24544 toys)
  
  

  I know what I went wrong...instead of 2/3 pi x radius^3, i only squared the radius for the hemisphere.
  
  Hence, the no. of toys i got was 38000+...
  
  At least got method mark...
• technoboy

  13 Nov 05, 10:35

  Originally posted by redstone:

  For vectors, X Y Z how?
  
  And how many cars does each family own on average?

  1.92 if I never remember wrongly...
• Texcoco II

  13 Nov 05, 11:23

  Originally posted by technoboy:

  1.92 if I never remember wrongly...

  yeap me also get 1.92