SOLUTION: if arctan x+2 arctan1 =3π/4, tanx is =? a. 1 b. -1 c. 0 d. π/4

1.  arctan(1) = .


2.  Therefore, the given equation takes the form


    arctan(x) + {{2*(pi/4)}}} = ,    or


    arctan(x) =  -  = .


3.  Therefore,  x = .