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Simple Tips for Better Maths Results!
"i was shocked and at the same time, amused by this teacher's action when i read the subject.
well, i believe this teacher did it with a kind intention 
at least he/she bothers to highlight the importance of doing satisfactorily for your studies just that his/her approach is wow!
LOL"
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5 marks, showing qn. Another question from GCE O Level Additional Mathematics (A-Math).
:)
Another question from O Level Additional Mathematics (A-Math).
lijun(: said...
i came across this qu that day, and i really want to clarify if the method i used is correct or not.int(tan^2x - x^3)
i changed it to int(sec^2x - 1 - x^3) instead, cos i don't think we can integrate tan.
is that feasible?
Absolutely. Since tan^2 x can't be integrated, you must think of alternative by making use of the relationship of tan^2 x + 1 = sec^2 x
Another question from O Level Additional Mathematics (A-Math).
lijun(: said...
hey. i just want to clarify something that i'm not very sure of.
is nCr x r! = nPr ??
By definition,
nCr = nPr/r!
Well, I never remember this 'rule'
For example, find the number of ways to form a 3 letter word from a,b,c,d,e
Student #1:
5C1*4C1*3C1
Student #2:
5P3
Both answers are correct though different approaches are taken, so no need to remember the 'rule'
:)
Another question for O Level Additional Mathematics (A-Math).
On the same diagram, sketch the graphs of
y=sin 3x & y=cos2x,
for x between 0 degree and 180 degree
Hence state the number of soutions to the equation
sin 3x=cos 2x
in the interval 0 degree less than or equals to x which is less then or equals to 180 degree
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