Question

To use your calculator to find cot^-1(x)-π/2tan^-1(x).

Answer 1

are you graphing this?
otherwise you need a x-value

Answer 2

cot^-1(x) = tan^-1(1/x)

if that helps

Answer 3

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)]