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20 15 mathematical analysis is the real problem for the postgraduate entrance examination
When x is in the range of (0, 1), f(x)=sinx/x is a continuous function.

And lim x→0+, f(x)= 1.

lim x→ 1-,f(x)=sin 1

According to Cantor's theorem, f(x) is uniformly continuous.

Similarly, when x is in the range of (-1, 0), f(x)=-sinx/x is a continuous function.

And lim x→0-, f(x)=- 1.

lim x→- 1-,f(x)=-sin 1

According to Cantor's theorem, f(x) is uniformly continuous.

When 0