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

show that the limit as h approaches zero of ((cosh-1)/h) = 0.

2. Relevant equations

*The bold numbers preceding each line are simply line numbers, they are not apart of the equations.*

1lim (as h approaches 0) of ((cosh - 1)/h)

2= lim (as h approaches 0) of -((2sin^{2}(h/2))/h)

3= -lim as theta approaches zero of ((sin[tex]\Theta[/tex]/[tex]\Theta[/tex])*sin[tex]\Theta[/tex]

4= -(1)(0)

5= 0

I'm confused as to how the author of the text was able to get from line 1 to line 2. If someone could workout the steps between these two lines I would be appreciative. I'm drawing a blank here!

Thanks

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# Homework Help: Proving: limit (as theta approaches zero) of sin(theta)/(theta) = 1

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