SOLUTION: How do I find the reciprocal of a complex number, specifically 9i? (Written in standard form)

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Question 675584: How do I find the reciprocal of a complex number, specifically 9i? (Written in standard form)
Answer by nerdybill(7384) About Me  (Show Source):
You can put this solution on YOUR website!
The reciprocal of:
9i
is
1/(9i)
.
But, we don't want i in the denominator so we multiply by:
1/(9i) * i/i
i/(9i^2)
i/(-9)
or
(-1/9)i