Trigonometry
posted by Cait .
n1/n divided by 1+1/n

Trigonometry 
Reiny
the way you typed it ...
(n  1/n) / (1 + 1/n)
remember in fractions, if we multiply top and bottom by the same number, the value of the fraction does not change, so , I will multiply top and bottom by n
= ( n  1) / (n + 1)
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