Math O level
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You aren't shading what... why dot?Originally posted by technoboy:The lines must be dotted right?
The two points are the one that cuts the angle bisector... -
Anyone has tips of studying for maths?
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actually, i always believe that one can either score for maths or just fail it. there's seriously no tips involvedOriginally posted by redstone:Anyone has tips of studying for maths? -
Triangle is isoceles...Originally posted by The man who was death:waah so kiang ah!! i have to say bye bye to 25 marks liao. the one with the circle and triangle u know how to do?? find the shaded area one??
Shaded area is the triangle - the sector -
Each mark in paper 1 is 0.625%Originally posted by redstone:Paper 1 80 marks, P2 is 100 marks, I think....
But both are 50%.
So makes me confused....
Prism and parallelogram i got do, but dunno if correct.....
Each mark in paper 2 is 0.5%
Yah. So altogether add up to 100%
Prism...
Time needed to fill the prism: 2 minutes
Prism volume is half of cuboid. therefore total 3 units. So 6 divide by 3 = 2
Parallelogram
PQ = RS
Therefore find the length between P and Q
Then minus the x-coordinate of R to find x-coordinate of S. y-coordinate is same as R
Midpoint of PR: (x coordinate of P+x coordinate of R) divide by 2, (y coordinate of P+y coordinate of R)
Equation of QR: Find gradient (y/x), then use y=mx+c. sub value of Q (x,y) into y=(gradient)x+c to find c (y-intersect).
Area: Height x length of PQ -
Ain't prism one third of cuboid?Originally posted by striderz_o405:Each mark in paper 1 is 0.625%
Each mark in paper 2 is 0.5%
Yah. So altogether add up to 100%
Prism...
Time needed to fill the prism: 2 minutes
Prism volume is half of cuboid. therefore total 3 units. So 6 divide by 3 = 2
Parallelogram
PQ = RS
Therefore find the length between P and Q
Then minus the x-coordinate of R to find x-coordinate of S. y-coordinate is same as R
Midpoint of PR: (x coordinate of P+x coordinate of R) divide by 2, (y coordinate of P+y coordinate of R)
Equation of QR: Find gradient (y/x), then use y=mx+c. sub value of Q (x,y) into y=(gradient)x+c to find c (y-intersect).
Area: Height x length of PQ -
if 1/3 then how did you answer the question?? decimal point ah?Originally posted by redstone:Ain't prism one third of cuboid?
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Ya.Originally posted by Griffie:if 1/3 then how did you answer the question?? decimal point ah?
I think I got 1.5mins.
Mean 1min 30 seconds la. -
If 1/3 can solve.. cos the answer will br 1.5min..
anyway, the y varies with x(square) the gain 100% one.. how do? -
so damn easy watOriginally posted by snowiesnow:If 1/3 can solve.. cos the answer will br 1.5min..
anyway, the y varies with x(square) the gain 100% one.. how do?
X gain 100% therefore X become 2X
(2X)^2 = 4X^2
so if 4 times right, K=constant=will not change
thus Y is 400% of its original, thus 300% increase.
(i forgot to minus 100% T.T) -
oh.. haha haiz. I sad lar. I spot a mistake when the teacher says times up..
when i wanted to take pen and do. that teacher in front of mi took my paper off. wao laos............................... >.<
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I put 100% squared= 100 000%!!!!Originally posted by Griffie:so damn easy wat
X gain 100% therefore X become 2X
(2X)^2 = 4X^2
so if 4 times right, K=constant=will not change
thus Y is 400% of its original, thus 300% increase.
(i forgot to minus 100% T.T) -
So is the prism 1/3 the cubiod?Originally posted by snowiesnow:If 1/3 can solve.. cos the answer will br 1.5min..
anyway, the y varies with x(square) the gain 100% one.. how do? -
TOA CAH SOH
"Big legged auntie"
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prism is half the cuboid.Originally posted by redstone:So is the prism 1/3 the cubiod?
Prism is the area of triangle x length (0.5 x lbh)
Cuboid is area of rectangle x length (lbh) -
nope, wrong thinking.Originally posted by skyfoo:actually, i always believe that one can either score for maths or just fail it. there's seriously no tips involved
I used to be very terrible in Maths. Then I did more and more exercise and force myself to practise doing various questions everyday. I did this for years.
And now I am almost done with my minor in Maths -
yah i know but how to cancel the pie in (p-q^2pie)Originally posted by striderz_o405:Triangle is isoceles...
Shaded area is the triangle - the sector
4.5cm- the sector= (p-q^2pie) then how to do?? -
At time math is turning into like an IQ test!!!
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Hahahahahha I did that too!!Originally posted by redstone:I put 100% squared= 100 000%!!!! -
did they ask u to cancel the pi? NopeOriginally posted by The man who was death:yah i know but how to cancel the pie in (p-q^2pie)
4.5cm- the sector= (p-q^2pie) then how to do??
Just ask u to find p and q. -
paper 1 over already. no use checking answer now ... might as well go and study hard for paper 2.
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How's paper 2 ppl!!!
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Ok paper for p2, angle question almost scare me to death cause i cant find certain angle until i realise the 56 degree is bisected..
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Ya me too... nearly got heart attack...Originally posted by DeathEdge:Ok paper for p2, angle question almost scare me to death cause i cant find certain angle until i realise the 56 degree is bisected..
That question very dizzying.... -
ya lar, there is sooo many angles in same segment , so many cyclic quad lol..Originally posted by redstone:Ya me too... nearly got heart attack...
That question very dizzying....