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OpenStudy (anonymous):
Find the period. y=cot (pi/2) x
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Directrix (directrix):
Period is 2. pi/ (pi/2) = 2 See graph at link for visual verification: http://www.wolframalpha.com/input/?i=cot%5B+%28pi%2F2%29+x%5D
OpenStudy (anonymous):
just 2 not 2pi?
Directrix (directrix):
Just 2.
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