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post #1 of 12 (permalink) Old Mar 30th, 2009, 04:15 AM Thread Starter
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Calculus

Anti derivative of e^(.8x)?

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post #2 of 12 (permalink) Old Mar 30th, 2009, 04:21 AM
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Re: Calculus

(5/4)e^(.8x) ?

is that right?
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post #3 of 12 (permalink) Old Mar 30th, 2009, 04:23 AM Thread Starter
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Re: Calculus

Seems right, thank you!

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post #4 of 12 (permalink) Old Mar 30th, 2009, 04:35 AM Thread Starter
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Re: Calculus

Last question, the integral of cos^2 (x)

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post #5 of 12 (permalink) Old Mar 30th, 2009, 04:59 AM
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Re: Calculus

Integral of cos˛(x) dx = 1/2x + 1/4sin(2x) + C
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post #6 of 12 (permalink) Old Mar 30th, 2009, 05:00 AM Thread Starter
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Re: Calculus

Sorry to be a pain, but could you shed light onto how you got that answer?

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post #7 of 12 (permalink) Old Mar 30th, 2009, 05:34 AM
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Re: Calculus

Quote:
Originally Posted by Amalgamate View Post
Sorry to be a pain, but could you shed light onto how you got that answer?
Use the double angle formula: cos(2x) = 2cos˛(x) - 1

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post #8 of 12 (permalink) Old Mar 30th, 2009, 06:28 AM
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Re: Calculus

I forgot this

I was very good at then time
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post #9 of 12 (permalink) Old Mar 30th, 2009, 06:32 AM
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Re: Calculus

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post #10 of 12 (permalink) Old Mar 30th, 2009, 09:28 AM
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Re: Calculus

i hated calculus. i could never understand it properly.

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post #11 of 12 (permalink) Old Mar 30th, 2009, 09:59 AM
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Re: Calculus

I loved Calculus...too bad I forgot it

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post #12 of 12 (permalink) Old Mar 30th, 2009, 11:59 AM
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Re: Calculus

Ahh calculus makes me ill just looking at it. I scraped through it with a 55 at university last year.
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