Question

how do i evaluate cot pie over 7?

Answer 1

\[\frac{ \pi }{7 }\]
is not a famous angle
so you have to use calculator
\[\cot \frac{ \pi }{7 } =\frac{\cos \frac{ \pi }{7 } }{\sin\frac{ \pi }{7 } }\]

Answer 2

what does cot mean though?

Answer 3

\[\cot x= \\\frac{ 1 }{ \tan x }=\\\frac{ 1 }{ \frac{ sinx }{ \cos x } } =\\\frac{ \cos x }{ \sin x }\]