arctan = 1/tan right?

[Keego]

I admit it, I'm too lazy to think.

 

[minendo]

yeah

actually i dont know cause its been years since i have taken trig, but i do remember the book being helpful

 

[TallBill]

ahh.. i tried to help you out.. now i got brain damage... AHH...

 

[Random Variable]

Ummm...no. 1/tan(x) = cot(x)

 

[Keego]

ok so arctan = tan^-1?

 

[Random Variable]

<< ok so arctan = tan^-1? >>


yes

 

[halik]

acrtan=inverse tan= tan^-1
1/tan is cotangent

 

[Random Variable]

I worded that wrong. I meant to say that it doesn't equal the reciprocal of tan(x).

 

[Keego]

thanks Vespasian (and others)

 

[StandardCell]

Technically, it's the integral of 1/(1+x^2) with respect to x.

 

[josphII]

ok here you go:

arctan (tan O) = O, where O is an angle

 

[josphII]

<< Technically, it's the integral of 1/(1+x^2) with respect to x. >>



actually its an infinite series, as is pi, e, sin, cos, etc

 

[DanFungus]

arctan uses the same range as Sin, so it can be from 90 degrees (pi/2) to -90 degrees (-pi/2)

 

[StandardCell]

<<

<< Technically, it's the integral of 1/(1+x^2) with respect to x. >>



actually its an infinite series, as is pi, e, sin, cos, etc >>



Uhhh, it's BOTH...the Taylor series expansion is a way of expressing it explicitly. I have merely expressed it compactly.

 

[Ionizer86]

the notation tan^-1 (X) is simply arctan (X). This is odd, since tan^2 (X) is actually (tan X)^2

I dislike the notation, but anyway, arctan X (or tan^-1 (X)) helps you to go from angle measure back to side proportion. For example, tan (30) (or tan pi/6 for you radian lovers) is equal to 1/2, since the opposite side will be half the length of the adjacent side.

Now, arctan (1/2) is 30 (or pi/6) because this brings you from opposite/adjacent side proportion back to the angle measure.

 

[Mountain]

it means " the arc(angle) whose tangent is the number ....whatever.

 

[lawaris]

he he he ......lazy ???

U lying SOB......U forgot the simple thing in trigo

 

[HappyFace]

Please stop all this math stuff before I fall over dead and puke my intestines all over the carpet.