Author Topic: Functions(IGCSE Maths)  (Read 4484 times)

Offline @d!_†oX!©

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Functions(IGCSE Maths)
« on: October 24, 2009, 09:55:37 am »
The question gives us a graph for f(x), where f(x) = sin x.
It says that we have to sketch the graph of g(x) where g(x) = 1-sinx
how do u do that???

and besides this how do we do questions similar to this like
sketch the graph of f(kx), f(x) + k , kf(x) and all when the graph for f(x) and the value of k are given to us???

plsssss help.....asap!!!!!!!!! :-[ :-[

thanks in advance!!!!!! :) :)
AAL IZZ WELL!!! ;)

Offline Ghost Of Highbury

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Re: Functions(IGCSE Maths)
« Reply #1 on: October 24, 2009, 09:59:42 am »
2 questions plz.

1) Could u plz provide me with a past paper question. year/paper no./ etc.

2) What is the scale of the x-axis in the sinx curve. is it in radians or degree?
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Offline @d!_†oX!©

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Re: Functions(IGCSE Maths)
« Reply #2 on: October 24, 2009, 10:01:57 am »

hmmmm..

its not a past paper question....its in one of my ref books
and for the scale...its degrees
AAL IZZ WELL!!! ;)

Offline Ghost Of Highbury

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Re: Functions(IGCSE Maths)
« Reply #3 on: October 24, 2009, 10:03:17 am »
hmmmm..

its not a past paper question....its in one of my ref books
and for the scale...its degrees
k..cool..will answer in my next post..
divine intervention!

Offline @d!_†oX!©

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Re: Functions(IGCSE Maths)
« Reply #4 on: October 24, 2009, 10:04:09 am »
hmm...kkk
m waiting dude!!!
AAL IZZ WELL!!! ;)

Offline Ghost Of Highbury

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Re: Functions(IGCSE Maths)
« Reply #5 on: October 24, 2009, 10:16:58 am »
k first make the table for f(x) = sin x (x = 0,90,180,270,360)

next make the table for g(x) = 1-sin x (x=0,90,180,270,360)

u can use the f(x) values in g(x) like this g(x) = 1- f(x)

--

after having the table ready ..plot them..

the final graph should look somehing like the 2nd image
« Last Edit: October 24, 2009, 10:21:02 am by | am | »
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Offline Ghost Of Highbury

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Re: Functions(IGCSE Maths)
« Reply #6 on: October 24, 2009, 10:20:30 am »
the final graph should look something like this
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Offline **!!superexcited!!!**

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Re: Functions(IGCSE Maths)
« Reply #7 on: October 24, 2009, 10:22:26 am »
hmmmm..

its not a past paper question....its in one of my ref books
and for the scale...its degrees
uhm...which book??

Offline @d!_†oX!©

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Re: Functions(IGCSE Maths)
« Reply #8 on: October 24, 2009, 10:25:28 am »
thanks adi...i really appreciate this....
@priyu i have this book form David Rayner nd its called " General mathematics, Revision and Practice "

hey adi cud u plss answer my other question as well....
PS for every single question will we have to make a table and plot the graph...even when it just tells us to sketch....there must be some shorthand method....
AAL IZZ WELL!!! ;)

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Re: Functions(IGCSE Maths)
« Reply #9 on: October 24, 2009, 10:26:58 am »
thanks adi...i really appreciate this....
@priyu i have this book form David Rayner nd its called " General mathematics, Revision and Practice "

hey adi cud u plss answer my other question as well....
PS for every single question will we have to make a table and plot the graph...even when it just tells us to sketch....there must be some shorthand method....
Hey i have David Rayner (Extended) too..!!

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Re: Functions(IGCSE Maths)
« Reply #10 on: October 24, 2009, 10:28:06 am »
Hey is any1 giving chem paper 6 on d 27th??

Offline Ghost Of Highbury

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Re: Functions(IGCSE Maths)
« Reply #11 on: October 24, 2009, 10:28:35 am »
thanks adi...i really appreciate this....
@priyu i have this book form David Rayner nd its called " General mathematics, Revision and Practice "

hey adi cud u plss answer my other question as well....
PS for every single question will we have to make a table and plot the graph...even when it just tells us to sketch....there must be some shorthand method....

making tables is ot a tedious task..it looks a little complicated thats it...like i said .. u can see and understand the questoin..like here...u can use one function in the other to make it easy.!!

@priyu - yes..i'm giving it..
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Re: Functions(IGCSE Maths)
« Reply #12 on: October 24, 2009, 10:31:12 am »
ohhk i get that,...bt i remember reading in some book about the transformations of these graphhs.....i'll get back to u wen wd it in my next post....
@priyu m giving paper 5....i wish i cud paper 6 toooo...its too easy.....bt our school doesnt give us this option!!
AAL IZZ WELL!!! ;)

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Re: Functions(IGCSE Maths)
« Reply #13 on: October 24, 2009, 10:31:28 am »
So, how and wat hv u done for chem??

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Re: Functions(IGCSE Maths)
« Reply #14 on: October 24, 2009, 10:32:22 am »
ohhk i get that,...bt i remember reading in some book about the transformations of these graphhs.....i'll get back to u wen wd it in my next post....
@priyu m giving paper 5....i wish i cud paper 6 toooo...its too easy.....bt our school doesnt give us this option!!
which school??