$Q52)\lim_{x\to0}\frac{1-cosx+sinx}{1-cosx-sinx}$
$Q53)\lim_{x\to0}\frac{e^{x}+e^{-x}-x^{2}-2}{sin^{2}x-x^{2}}$
; 05-31-2017 01:22 PM
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$Q55)\lim_{x\to0}\frac{2sin{x}'(1-cos{x}')}{x^{3}}$
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$Q56)\lim_{x\to0}\frac{ln(tan^{-1}4x)}{ln(tan5x)}$
$Q57)\lim_{x\to\frac{-\pi }{2}}\frac{2-cos^{2}x+2sinx}{(x+\frac{\pi }{2})^{4}}$
; 05-17-2018 05:49 PM
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