Wednesday, 20 March 2013

calculus - How can I solve this crazy limit? limxrightarrow0frac1cosleft(frac1cosxcos2xx2frac52right)cos2xx2

Firstly, I think this can be done with equivalent infinitesimal, but it seems so much complicated. I'm not very brave to do L'Hospital's rule on this question. And I don't think trig formulas can simplify this..



limx01cos(1cosxcos2xx252)cos2xx2

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