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Among (i) ("lim")(xvec0)sec^(-1)(x/(sinx...

Among (i) `("lim")_(xvec0)sec^(-1)(x/(sinx))a n d(i i i)("lim")_(xvecoo)sec^(-1)((sinx)/x)` (i) exists, (ii) does not exist (i) does not exist, (ii) exists both (i) and (ii) exist neither (i) nor (ii) exists

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