What is the exact value of $cot (pi/2)$ ?

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Answer 1 · 2018-03-17T01:25:50

$color(blue)(cot (pi/2) = 1 / tan (pi/2) = 1/ oo = 0$

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As may be seen from the table above,
$cot (pi/2) = 1 / tan (pi/2)$

But $tan (pi/2) = oo$

Hence $cot (pi/2) = 1 / tan (pi/2) = 1/ oo = 0$

What is the exact value of cot (pi/2)cot (pi/2)?