How do you evaluate $csc 0$ ?

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Answer 1 · 2016-07-22T17:26:33

$csc0$ is undefined.

Remember that $csctheta=1/sintheta$ .

Now $sin0=0 rArr csc0$ is undefined.

In fact, the Domain of $csc$ function is

$RR-{kpi : k in ZZ}=RR-{0,+-pi,+-2pi,.................}$ , so, $csc0$ is not defined.

How do you evaluate csc 0csc 0?