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integration (1 Viewer)

lolokay

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Re: 回复: Re: integration

what's the derivative of sin-1x?
 

Dumbledore

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x = sin@
dx= cos@ d@
sqrt(1-x^2) = sqrt(1-sin^2(@))= cos(@)
integral(arcsin(sin(@))dx
@^2
= sin^2x
 

shuning

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回复: Re: integration

sorry, you used u sub right??? i solved this question using u sub, and yeh i dont know what you did in the second line.

thanks
that's how ppl in china writes it....

i hardly came across some aus high school students writes it that way... he prob learnd it in uni LOL

NOOB AUS HIGH SCHOOL EDUCATION XD
 

Drongoski

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Re: 回复: Re: integration

No I 'invented' this approach long ago.


Zhege fangfa shi wo ziji faming de.
 
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GUSSSSSSSSSSSSS

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Re: 回复: Re: integration

lol greaaaaaaaaat question shuning =P

but actually quite a few people in australia write it the way drongoski did xD
...even my bogan math teacher

for example today he gave us a math joke:

FIND:
integral(1/cabin)d(cabin) .... xDD
 

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