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InvisibleMerkin
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math help
    #7560528 - 10/25/07 07:59 PM (16 years, 3 months ago)

help me with this please @_@

express this Cartesian relation in polar form:

x^2 + y^2 - 4x +6y - 20 = 0

i'm thinking i have to do it in "r + Θ"

so r^2 = x^2 + y^2.


what now :P?

thanks


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Edited by Merkin (10/25/07 08:09 PM)


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Offlinerazmablues
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Re: math help [Re: Merkin]
    #7560536 - 10/25/07 08:01 PM (16 years, 3 months ago)

ahah you'd think a calculus problem would be the last type of post you'd find on a magical mushroom forum :mushroom2:

long live the shroomery... good luck getting the answer to that, if i hadn't dropped calc i'd help ya out!


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InvisibleMerkin
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Re: math help [Re: Merkin]
    #7560700 - 10/25/07 08:48 PM (16 years, 3 months ago)

hmmm

so then,

x = rcosΘ

y = rsinΘ

therefore r^2 - 4rcosΘ - 6rsinΘ - 20 = 0

what now D:?! dont think thats it..


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OfflineTangerines
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Re: math help [Re: Merkin]
    #7560713 - 10/25/07 08:50 PM (16 years, 3 months ago)

Somehow use the identity: sin^2 + cos^2 =1?? What are you solving for?


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InvisibleMerkin
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Re: math help [Re: Tangerines]
    #7560725 - 10/25/07 08:51 PM (16 years, 3 months ago)

Quote:

express this Cartesian relation in polar form:




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Offlineskydog
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Re: math help [Re: Merkin]
    #7560815 - 10/25/07 09:13 PM (16 years, 3 months ago)

If you're just looking for a polar equation, then I guess you've already got it.

r^2 - 4rcos[theta] + 6rsin[theta] = 20

I don't think the question is asking for a pair of coordinates in polar form, such as (r, theta), since you're not given Cartesian coordinates in the form (x, y).  I could be wrong though  :meff:


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InvisibleMerkin
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Re: math help [Re: skydog]
    #7560838 - 10/25/07 09:19 PM (16 years, 3 months ago)

yea i think we're right..

yea i think i interpreted it wrong, thinking it was asking me for the co ords.

cheers! :cheers:


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Offlinenakors_junk_bag
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Re: math help [Re: Merkin]
    #7560841 - 10/25/07 09:20 PM (16 years, 3 months ago)

yo, O will hold you donw.

was up?


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InvisibleMerkin
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Re: math help [Re: nakors_junk_bag]
    #7560847 - 10/25/07 09:21 PM (16 years, 3 months ago)

wtf ?


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Offlinenakors_junk_bag
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Re: math help [Re: Merkin]
    #7560851 - 10/25/07 09:22 PM (16 years, 3 months ago)

huh?


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Re: math help [Re: nakors_junk_bag]
    #7560853 - 10/25/07 09:23 PM (16 years, 3 months ago)

I am working on your shit now!

give me a moment and all your homework will be done!


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Re: math help [Re: nakors_junk_bag]
    #7560859 - 10/25/07 09:25 PM (16 years, 3 months ago)

math :awesome:


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Offlinenakors_junk_bag
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Re: math help [Re: skydog]
    #7560866 - 10/25/07 09:28 PM (16 years, 3 months ago)

its the only thing that makes feel like I am a useful pair of chromosomes


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Offlineskydog
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Re: math help [Re: nakors_junk_bag]
    #7560868 - 10/25/07 09:29 PM (16 years, 3 months ago)

I hear ya :bongload:


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Offlinenakors_junk_bag
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Re: math help [Re: skydog]
    #7560877 - 10/25/07 09:32 PM (16 years, 3 months ago)

Merkin? /


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InvisibleMerkin
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Re: math help [Re: nakors_junk_bag]
    #7560895 - 10/25/07 09:37 PM (16 years, 3 months ago)

lol hey


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Offlinenakors_junk_bag
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Re: math help [Re: Merkin]
    #7560918 - 10/25/07 09:41 PM (16 years, 3 months ago)

cool, you are still here, now how bad do you want the answer? Just tell me when I double space, then you will get your answer.

by the way, hey!


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InvisibleMerkin
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Re: math help [Re: nakors_junk_bag]
    #7561062 - 10/25/07 10:16 PM (16 years, 3 months ago)

i don't want your answer.


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