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Question #d3748

1 Answer

Feb 8, 2017

cot ((3pi)/4) = -1

Explanation:

$cot ((11pi)/4) = cot ((3pi)/4 + (8pi)/4) = cot ((3pi)/4 + 2pi) = cot ((3pi)/4)$
Trig table of special arcs gives:
$cot ((3pi)/4) = - 1$

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