How do you find the value of $cot 270$ ?

Question

How do you find the value of $cot 270^circ$ ?

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Answer 1 · 2018-08-03T07:11:59

$cot270^circ=0$

Here ,

$cot270^circ=cot(360^circ-90^circ)$

$:.cot270^circ=cot(2pi-pi/2)$

$:.cot270^circ=-cot(pi/2)$

$:.cot270^circ=-cos(pi/2)/sin(pi/2)$

$:.cot270^circ=-0/1=0$