If `[tan^(-1)x]^(2)-2[tan^(-1)x]+1<=0`, Where `[.]` denotes greatest integer `<=x`,x belongs to

Let |[tan^(-1)x,tan^(-1)2x,tan^(-1)3x],[tan^(-1)3x,tan^(-1)x,tan^(-1)2x],[tan^(-1)2x,tan^(-1)3x,tan^(-1)x]|=0 , then the number of values of x satisfying the equation is 1 (b) 2 (c) 3 (d) 4

Solve for x : tan^(-1)(2+x)+tan^(-1)(2-x)=tan^(-1)2/3 , where x sqrt(3)

Solve for x : tan^(-1)(x+2)+tan^(-1)(x-2)=tan^(-1)(8/(79)) , x >0

Solve for x; tan^(-1)(1/2)+tan^(-1)2=tan^(-1)x

If tan^(-1)(x+2)+tan^(-1)(x-2)-tan^(-1)((1)/(2))=0 , them one of the values of x is equal to

If tan^(-1)(a/x) + tan^(-1)(b/x) =pi/2 , then: x=