Here's the question you clicked on:
ktluo
To use your calculator to find cot^-1(x)-π/2tan^-1(x).
are you graphing this? otherwise you need a x-value
cot^-1(x) = tan^-1(1/x) if that helps
If u want to find "x" then you use cot^-1(x)=1/cot(x) and tan^-1(x)=1/tan(x) cot^-1(x) =Π/2 tan^-1(x) tan(x)=Π/2*[1/tan(x)] tan^2(x)=Π/2 tan(x)=√(Π/2) X=tan^-1[√(Π/2)]