Question 1135389


{{{855=2*360+135}}}=>{{{cot (855)=cot (135)}}}

the exact function value:

{{{cot (135)=-1}}}
=>{{{cot (855)=-1}}}

Reference angle is the smallest angle that the terminal side of a given angle makes with the x-axis.

will be in II quadrant, so {{{180-135=45}}}°