can anyone tell me if tan-1x= 1 over tan x?
No. They are different. tan^-1 (x) is a frequently used way of writing arctan x, which means the angle whose tangent is x.
tan (tan^-1 x) = x
No. They are different. tan^-1 (x) is a frequently used way of writing arctan x, which means the angle whose tangent is x.
tan (tan^-1 x) = x