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OpenStudy (anonymous):
What is the limit of (cos x-1)/(2x^2) as x approaches 0?
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hartnn (hartnn):
can u use L'Hopital's rule?
OpenStudy (anonymous):
nope :(
OpenStudy (anonymous):
As in you haven't covered it or as in you are not sure how to use it?
OpenStudy (anonymous):
as in not covered yet lol
hartnn (hartnn):
multiply and divide by 1+cos x
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OpenStudy (anonymous):
(cos^x-1)/(2x^2)(cosx+1) ?
hartnn (hartnn):
right! now what is 1-cos^2 x = ??
OpenStudy (anonymous):
sin^2x thank you!
hartnn (hartnn):
welcome ^_^
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