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

Find the limit:

lim (tanx-1)/(x-pi/4)

x->pi/4

2. Relevant equations

tanx = sinx/cosx

3. The attempt at a solution

lim (sinx/cosx-1)/(x-pi/4)

x->pi/4

lim [(sinx-cosx)/cosx]/(x-pi/4)

x->pi/4

I have no idea what to do after this ): I also tried squaring the whole function and getting tan^{2}x-1 = sec^{2}x, but I get so lost on what to do with pi/4 because it just keeps becoming undefined!

Thanks for your help!!

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# Homework Help: Finding limits

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