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

∫√(4-x^2)/x dx

2. Relevant equations

3. The attempt at a solution

a^2=4 u^2=x^2 ⇒ u=asinθ

a=2 u=x

x=2sinθ sinθ

2cosθ=√(4-x^2)

dx=2cosθ dθ

∫√(4-4sin^2θ)/2sinθ 2cosθ dθ

∫2cos^2θ/2sinθ 2cosθ dθ

2∫cos^2θ/sinθ cosθ dθ

Now what????????????? I have been working on this problem for the last 3 3 hours and I am at a stand still. Can somebody Please get me to the answer?????????

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# Homework Help: Integration By Trig Substitution

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