Sunday, 2 February 2014

limits without lhopital - Find limxto0frace2x1tanx

I'd like help finding



limx0e2x1tanx




without the use of L'Hôpital's rule.



So far I did this:



limx0e2x1tanx


=limx0cosx(e2x1)sinx

=limx0xcosx(e2x1)xsinx

=limx0cosx(e2x1)x




Basically I got nowhere. Any hints or partial solutions to help me?



By the way, the is the 1969 AP BC Multiple Choice #28.

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