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[" 10."lim(x rarr1)(sqrt(1-cos2(x-1)))/(...

[" 10."lim_(x rarr1)(sqrt(1-cos2(x-1)))/(x-1)],[" (a) exists and it equals "sqrt(2)],[" (b) exists and it equals "-sqrt(2)],[" (c) does not exist because "x-1rarr0],[" (d) does not exist because left hand limit is not equal to "],[" right hand limit "]

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