(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

[itex]\int x/sqrt{(x^{2}+4)}[/itex]

2. Relevant equations

x=2tanx

3. The attempt at a solution

x=2tanx

[itex]\int[/itex]2tan[itex]\vartheta[/itex]/[itex]\sqrt{tan^2\vartheta}[/itex]+4

2/2 *[itex]\int[/itex]tan/sec

[itex]\int[/itex]sin=-cos

now is the part where i am stuck

i know from using substitution that the answr should be [itex]\sqrt{x^2+4}[/itex]

but no matter how i manipulate it, it comes out strange.

all help is appreciated

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# Homework Help: Trig substitution should be simple but it's driving me nuts

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