Respuesta :
tan a = b
arc tan b = a
So
a = x +1
b = 0
tan x + 1 = 0
arc tan (0) = 0
x+1 = 0
x = -1
arc tan b = a
So
a = x +1
b = 0
tan x + 1 = 0
arc tan (0) = 0
x+1 = 0
x = -1