how do i determine whiich to take as "u" | Mathematics | Page 1

crystal ginkgo Mar 8, 2023, 9:59 PM

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u=√x
u²=x
2udu=dx
1/u cos(u) 2udu= 2cos(u)
integrate:
2sin(u) + C
2sin(√x) + C

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gotta isolate x

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I use intuition but i dunno

clever topaz Mar 9, 2023, 2:03 AM

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by observation, and btw that's already correct so just directly substitute then integrate

fading badger Mar 9, 2023, 3:12 AM

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Thanks @clever topaz

stuck shellBOT Mar 9, 2023, 3:12 AM

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@vital drift has given 1 rep to @clever topaz

fading badger Mar 9, 2023, 3:13 AM

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Thanks @crystal ginkgo

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I wanted to know do i know which to take as u

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I know how to integral it

#how do i determine whiich to take as "u"