- #1

Glissando

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## Homework Statement

Find the limit:

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

x->pi/4

## Homework Equations

tanx = sinx/cosx

## 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!