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

https://gyazo.com/268bef206850bfbf30fb0cca3f783599 <----- The question

2. Relevant equations

3. The attempt at a solution

Had this on a test today, honestly not sure how to evaluate. I know you can pass the limit to the inside of arctan but I can't see how the inside goes to infinity. Any help would be appreciated I just want to understand how to do it!

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# Multi variable Limit

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