Indeterminate Expression
An undefined expression which
can have a value if arrived at as a limit.
Note: Another way to
think about indeterminate expressions is to see them as a disagreement between two rules for simplifying an expression. For example, one way to think about is
this: The 0 in the numerator makes the fraction "equal" 0,
but the 0 in the denominator makes the fraction "equal" ±∞.
This conflict makes the expression indeterminate.
Common indeterminate expressions:
0^{0} 1^{∞} ∞^{0} ∞ – ∞

Example:

The limit
seems to evaluate to , which is indeterminate. In fact,
since sin x and x are approximately equal to each other for values of x near 0.
Note that this limit can also be computed using l’Hôpital’s rule. 
