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Author Topic: C1 and C2 DOUBTS HERE!!!!!  (Read 98231 times)

Offline The Golden Girl =D

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Re: C1 and C2 DOUBTS HERE!!!!!
« Reply #600 on: December 15, 2011, 12:47:39 pm »
Wa Jazaki =]

Allah yiwaf2eek :D
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Offline ~ Miss Relina ~

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Re: C1 and C2 DOUBTS HERE!!!!!
« Reply #601 on: December 19, 2011, 09:01:41 am »
Excuse me anyone help with this  :( :(


if you need the answer notify me
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Offline astarmathsandphysics

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Re: C1 and C2 DOUBTS HERE!!!!!
« Reply #602 on: December 19, 2011, 11:46:57 am »
use 1-cos^2 x = sin^2 x in last part. Attached
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Offline ~ Miss Relina ~

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Re: C1 and C2 DOUBTS HERE!!!!!
« Reply #603 on: December 19, 2011, 12:27:46 pm »
Quote from: astarmathsandphysics on December 19, 2011, 11:46:57 am
use 1-cos^2 x = sin^2 x in last part. Attached

shoudn't part (b)
 be like that (0 ,pi/9 ,2pi/9 , pi/3 )
as he asked for three equal intervals
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Offline astarmathsandphysics

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Re: C1 and C2 DOUBTS HERE!!!!!
« Reply #604 on: December 19, 2011, 08:56:59 pm »
They asked for three ordinates - an ordinate is an x value. 3 ordinates means two interval, since each interval has an order at each end. Lot of marks lost cos of this.
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Offline ~ Miss Relina ~

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Re: C1 and C2 DOUBTS HERE!!!!!
« Reply #605 on: December 21, 2011, 09:45:34 am »
Quote from: astarmathsandphysics on December 19, 2011, 08:56:59 pm
They asked for three ordinates - an ordinate is an x value. 3 ordinates means two interval, since each interval has an order at each end. Lot of marks lost cos of this.

Now I got it thank you Sir
but I know it might be annoying to ask more about it but here is my doubt in your worked solution
I'm really sorry for disturbing  :-[ :-[
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Offline astarmathsandphysics

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Re: C1 and C2 DOUBTS HERE!!!!!
« Reply #606 on: December 21, 2011, 11:20:46 am »
I used the identity 1-cos^2 x + sin^2 x and rearranged it to give sin^2 x = 1-cos^2 x
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Re: C1 and C2 DOUBTS HERE!!!!!
« Reply #607 on: December 21, 2011, 12:16:22 pm »
Quote from: astarmathsandphysics on December 21, 2011, 11:20:46 am
I used the identity 1-cos^2 x + sin^2 x and rearranged it to give sin^2 x = 1-cos^2 x

why the integration of the 1 in( 1-cos^2x) not X following the rule (x^n+1)/(n+1)
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Offline astarmathsandphysics

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Re: C1 and C2 DOUBTS HERE!!!!!
« Reply #608 on: December 21, 2011, 09:42:05 pm »
write 1 as x^0 then add one to the power and divide by the new power to give x^1/1=x
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Offline ~ Miss Relina ~

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Re: C1 and C2 DOUBTS HERE!!!!!
« Reply #609 on: December 22, 2011, 08:27:48 pm »
Quote from: astarmathsandphysics on December 21, 2011, 09:42:05 pm
write 1 as x^0 then add one to the power and divide by the new power to give x^1/1=x

okay now I got it alll thaaaaaaaaaank you  :D
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Offline astarmathsandphysics

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Re: C1 and C2 DOUBTS HERE!!!!!
« Reply #610 on: December 22, 2011, 08:39:43 pm »
no probs. Try the test centre on my website. Only GCSE/IGCSE tests up now but more soon
http://www.astarmathsandphysics.com/test_centre/
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Offline MKh

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Re: C1 and C2 DOUBTS HERE!!!!!
« Reply #611 on: December 23, 2011, 12:49:22 pm »
Quote from: astarmathsandphysics on December 22, 2011, 08:39:43 pm
no probs. Try the test centre on my website. Only GCSE/IGCSE tests up now but more soon
http://www.astarmathsandphysics.com/test_centre/

Thanks for making this test centre. It sounds really interesting.
But what exactly is it like? We can take tests there?
And by when will u be able to add the A/L tests?

Thanks once again.
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Re: C1 and C2 DOUBTS HERE!!!!!
« Reply #612 on: December 24, 2011, 09:57:59 am »
Quote from: astarmathsandphysics on December 22, 2011, 08:39:43 pm
no probs. Try the test centre on my website. Only GCSE/IGCSE tests up now but more soon
http://www.astarmathsandphysics.com/test_centre/

Thanks Sir
unfortunately I finished my IGCSE maths last year .........but I'll tell my friends about it ...... ;D

  ;)
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Offline astarmathsandphysics

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Re: C1 and C2 DOUBTS HERE!!!!!
« Reply #613 on: December 24, 2011, 01:59:38 pm »
yes do, cos I intend to teach the world some maths.
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Offline ~ Miss Relina ~

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Re: C1 and C2 DOUBTS HERE!!!!!
« Reply #614 on: December 24, 2011, 04:01:13 pm »
Sir do you agree with me or not  ;)
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