#integral

101 messages · Page 1 of 1 (latest)

worldly surge
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I need to solve this integral, but I don't understand how to do it.

weary deltaBOT
valid lance
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what is your progress?

worldly surge
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None. I don't know how and where to start

valid lance
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try x = cos theta

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@worldly surge

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sorry for the late reply

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do you know the half angle formulae?

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sorry ignore all my work and handwriting

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just follow the arrows

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i am a little confused what should we do next

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did another substitution

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It just gets messier after the double substitution

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@worldly surge sorry cant do it :(

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@minor oracle yo how u do this shi

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@frank tulip

frank tulip
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imma try this when i hit home and honestly a nap

valid lance
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I'll try again after coming back from my gym

worldly surge
frank tulip
random raven
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wtf this is a good problem

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nothing is working shit

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@worldly surge

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brother

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are u sure the function is correct

frank tulip
random raven
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yeah i should fr

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bro

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@frank tulip

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could we try

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putting x = ln t or something

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as there is a derivative

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idt trig is really helping

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i tried sin cos tan tan^2

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nothing fucking works

worldly surge
worldly surge
valid lance
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I did like 3 pages nothing worked

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And do not even think of subbing ln x

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Why do you wanna make your live a living hell @random raven

frank tulip
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I also tried various things but didnt come far, the Integral also looks really long and conplicated so I think I wont bother with anymore haha

valid lance
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Oh nah this shit is way too long

minor oracle
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That way you can atleast get rid of the 1/x which is outside the cuberoot

valid lance
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But my way most of it is solved

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Can you check my work @minor oracle

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CosX = t

minor oracle
low stirrup
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note that $\f{1-x}{1+x}=\f{1+x-2x}{1+x}$

sand oceanBOT
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🫎 A Certain User(Moosey) 🫎

minor oracle
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Yes, but where do you go from there?

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2x/1+x is still something to solve for

low stirrup
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u=1+x

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albeit that gets you a 1/u, so i still dk

minor oracle
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Actually. Yes. That's so genius

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The splitting allows you to cancel out the external 1/x

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Heck yeah

low stirrup
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...does it?

minor oracle
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It doess

low stirrup
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but it becomes 1/(u-1)

minor oracle
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So, the bracket part gets split to
1 - 2x/1+x

After you multiply the 1/x to these two terms, you get
1/x - 2/1+x

low stirrup
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oh wait

minor oracle
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These you can solve now pretty easily ig

low stirrup
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1/x

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becomes 1/x^3

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when you move it in the cube root

minor oracle
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Oh wait, there's a cuberoot

low stirrup
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lmao

minor oracle
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I forgor about that 💀

frank tulip
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se x common

minor oracle
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You can do that

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Let's try that

low stirrup
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bleak

frank tulip
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I wonder how people come up with those random integrals lol

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"Yeah i just got into calc 1 and my professor gave me this lol help"

minor oracle
valid lance
random raven
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ukw

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wolfram alpha

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😭

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frr

empty urchin
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It says do a u sub for ln x

random raven
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yeah i did that

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but it didnt work

empty urchin
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Then replace the x with e^u

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Then do another u sub with the stuff inside the cbrt

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🤷

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i wouldn’t have come up with this by myself

winter sky
winter sky
valid lance
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Why do intelligent people even exist