Hi in school we learn the inverse Tangent by displaying it as Tan^-1, but I've seen people talk about an arcTangent is that the same as Tan^-1 (the inverse tangent)?

I mean I looked at a site that explained it and the ratio came up Opp/Adj which seems like the Trig ratios for right angles, it looked like the same proceudre I would go about finding an angle with 2 sides using the TAN ration so I am assuming it is the same?

correct or not?
Posted on 2003-04-13 13:15:17 by x86asm
Ah. The two are actually the same. The inverse tan function, also called arctan(x), is usually denoted by tan^-1(x). The notation may seem a little funny though since tan^-1(x) (arctan(x)) is not tan(x)^-1 (1 / tan(x)) :)

Hope that clears it up.
Posted on 2003-04-13 13:47:51 by Miko
Yep, tan^-1 is modern slang for arc tan.
Posted on 2003-04-13 13:47:58 by Sephiroth3
tan(arctan(x))=x (moved into the first or fourth quadrant)

arctan(x) can also be notated as tan^-1(x)... this is not to be confused with tan(x^-1) or tan(x)^-1.

tan(x^-1) is the same as tan(y) where y=x^-1.
tan(x)^-1 is the same as y^-1 where y=tan(x)
Posted on 2003-04-13 14:24:42 by jademtech

Ah. The two are actually the same. The inverse tan function, also called arctan(x), is usually denoted by tan^-1(x). The notation may seem a little funny though since tan^-1(x) (arctan(x)) is not tan(x)^-1 (1 / tan(x)) :)

Hope that clears it up.


ya what you were talking about screwed me up earlier in my math course, boy it cost me some marks :(
Posted on 2003-04-13 17:29:37 by x86asm
Thanks guys I was confused, you guys cleared it up :)
Posted on 2003-04-13 17:30:54 by x86asm