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Mathematics 20 Online
OpenStudy (anonymous):

Find the period. y=cot (pi/2) x

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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