Qualification > Math
IGCSE MATHS Doubts
Baladya:
ya its really old :P
and also hard. I cant think of anyway u can find the sides...
The Golden Girl =D:
By the way i have another question answer it for me ,plz!!
it's november 2000 paper 2 ...question 21) part a) .......i just wanna know y do i have to do this "180-54" .....i just don't get this part
can someone plz answer me :-\
as for contraentry ..thx alot for the help abt the other question .......just to let u kno i really want to help but i gtg cuz mystudy group r comin over .... srry :-[
ksitna:
hey how do i do ques
11 b
13
p2 j2006
Ghost Of Highbury:
--- Quote from: ksitna on May 05, 2010, 04:17:10 pm ---hey how do i do ques
11 b
13
p2 j2006
--- End quote ---
11b) =
Cross multiply
x = 4x + 12
12 = -3x
x = -4
13) =
cross multiply
3x - 6 = 8x + 20
-5x = 26
x = -5.2
contraentry:
--- Quote from: A@di on May 05, 2010, 03:57:03 pm ---which year is this from?
--- End quote ---
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.
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