Qualification > Math
IGCSE MATHS Doubts
Ghost Of Highbury:
Ur welcome.
Saladin:
I think Aadi is rite in his method. dnt hav time to check exact details.
Baladya:
--- Quote from: haris94 on May 05, 2010, 06:47:31 pm ---V1/V2 = (l1/l2)3
so
5/v2 = (2/0.4)3
v2 = 5*(0.4)3
(2)3
v2 = 0.04m3
0.04*1000
=40 cm3
--- End quote ---
OMG HOW DID I FORGET THE RATIO THING ??? ??? Anyway thanks man ;)
haris94:
lol.....no probs
The Golden Girl =D:
--- Quote from: contraentry on May 05, 2010, 04:30:18 pm ---This is from November 1990 P4
@The golden girl: You're welcome!
You need to do the "180 - 54" because the question says it is an obtuse angle, and the Sine function proves : Sin 54 = Sin(180-54)
Moreover, 54 is not an obtuse angle, an obtuse angle is defined as an angle being greater than 90 and less than 180.
--- End quote ---
thx again !!
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