Author Topic: C3 and C4 DOUBTS HERE!!!  (Read 35714 times)

Offline Darkstar3000

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Re: C3 and C4 Doubts Here!!!
« Reply #60 on: January 20, 2011, 06:22:12 pm »
cos tan^{-1} infinity =90

Thank you my good sir :D

Offline qooqo111

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Re: C3 and C4 Doubts Here!!!
« Reply #61 on: January 23, 2011, 02:06:39 pm »
In chp 3 (binomial expansion)
what do they mean by state/find the range of values for which the expansion is valid ....??
Thank You :D

elemis

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Re: C3 and C4 Doubts Here!!!
« Reply #62 on: January 23, 2011, 04:24:44 pm »
Dude ? Seriously ?

There's a thread already in blue on the message board that says ALL C4 DOUBTS HERE !!!!

Why couldnt you post it there ?

Topic merged.

Offline astarmathsandphysics

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Re: C3 and C4 Doubts Here!!!
« Reply #63 on: January 23, 2011, 08:01:15 pm »
They mean the series convergences

**RoRo**

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Re: C3 and C4 Doubts Here!!!
« Reply #64 on: February 12, 2011, 02:03:46 pm »
I have a question, which formulas do we need to know for Trigonometry and which ones will be there in the Formula book?

Thanks in advance!

elemis

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Re: C3 and C4 Doubts Here!!!
« Reply #65 on: February 12, 2011, 04:01:03 pm »
I have a question, which formulas do we need to know for Trigonometry and which ones will be there in the Formula book?

Thanks in advance!

Attached is the formula booklet page for C3.

**RoRo**

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Re: C3 and C4 Doubts Here!!!
« Reply #66 on: February 12, 2011, 04:04:14 pm »
Attached is the formula booklet page for C3.

Thank you so much!! :D

Sorry to trouble you, but have you got that for C1, C2, C4, M1 and S1? That would be of great help!

elemis

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Re: C3 and C4 Doubts Here!!!
« Reply #67 on: February 12, 2011, 04:19:59 pm »
Thank you so much!! :D

Sorry to trouble you, but have you got that for C1, C2, C4, M1 and S1? That would be of great help!

http://www.edexcel.com/migrationdocuments/GCE%20New%20GCE/N38210A-GCE-Mathematical-Formulae-Statistical-Tables.pdf


Offline thenewkid™

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Re: C3 and C4 Doubts Here!!!
« Reply #69 on: March 06, 2011, 02:07:32 pm »
jan 2009 c3 edexcel q6

HELP
thnQ
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**RoRo**

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Re: C3 and C4 Doubts Here!!!
« Reply #70 on: April 03, 2011, 11:56:29 am »
How do you integrate the following function sec2xtan2x by substitution method? I need the working please, thank you! :)

elemis

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Re: C3 and C4 Doubts Here!!!
« Reply #71 on: April 03, 2011, 02:10:36 pm »
How do you integrate the following function sec2xtan2x by substitution method? I need the working please, thank you! :)

10 minutes.

elemis

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Re: C3 and C4 Doubts Here!!!
« Reply #72 on: April 03, 2011, 02:23:09 pm »
\int sec^2xtan^2x


Let u=tanx


\frac{du}{dx}=sec^2x


Since du=sec2x dx :


\int tan^2x~du


Additionally u=tanx hence :


\int u^2~du


Integrating gives :


\frac{u^3}{3}


Substituting for u gives :


\frac{tan^3x}{3}
« Last Edit: April 03, 2011, 02:30:13 pm by Ari Ben Canaan »

**RoRo**

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Re: C3 and C4 Doubts Here!!!
« Reply #73 on: April 03, 2011, 02:58:28 pm »
\int sec^2xtan^2x


Let u=tanx


\frac{du}{dx}=sec^2x


Since du=sec2x dx :


\int tan^2x~du


Additionally u=tanx hence :


\int u^2~du


Integrating gives :


\frac{u^3}{3}


Substituting for u gives :


\frac{tan^3x}{3}


THANK YOUUU!! ;D

Offline mdwael

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Re: C3 and C4 Doubts Here!!!
« Reply #74 on: April 05, 2011, 12:10:03 pm »
Do we have to memorize the expansions of Sin(A+B), Cos(A+B), CosA CosB- SinA Sin B or they'll be given in the formula booklet?
Also does anyone know a helpful website to help me in chapters 6 and 7? (tirgnometry)
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