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posted by Reen on Saturday, November 7, 2009 at 10:26pm.

lim as x-> infinity sec^2(1/x)

As x ---> ∞ , 1/x ---> 0 So lim sec^2(1/x) as x---> infinity = lim sec^2(x) as x---> 0 = lim (1/cos^2(x) as x --->0 = 1/1 = 1

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