What Math.Tanh(1) return?

[Polaris]

Hi Experts:

I have a question about Math.Tanh:

For a 45 degree 'angle' (radians is 45 * pi / 180 = 0.785), Math.Tan(angle)
returns 1 as expected; but Math.Tang(1) returns 0.76. Why not 0.785?

Thanks in Advance!
Polaris

[=?ISO-8859-1?Q?Arne_Vajh=F8j?=]

Polaris wrote:

I have a question about Math.Tanh:

For a 45 degree 'angle' (radians is 45 * pi / 180 = 0.785),
Math.Tan(angle) returns 1 as expected; but Math.Tang(1) returns 0.76.
Why not 0.785?

Math.Tanh does some different.

It is Math.Atan you want !

Arne

[Polaris]

Thanks!
Polaris

"Arne Vajhøj" <ar**@vajhoej.dkwrote in message
news:47***********************@news.sunsite.dk...

Polaris wrote:

>I have a question about Math.Tanh:

For a 45 degree 'angle' (radians is 45 * pi / 180 = 0.785),
Math.Tan(angle) returns 1 as expected; but Math.Tang(1) returns 0.76. Why
not 0.785?

Math.Tanh does some different.

It is Math.Atan you want !

Arne

[christery]

On 16 Dec, 20:45, Arne Vajhøj <[e-mail]:

Polaris wrote:

I have a question about Math.Tanh:

For a 45 degree 'angle' (radians is 45 * pi / 180 = 0.785),
Math.Tan(angle) returns 1 as expected; but Math.Tang(1) returns 0.76.
Why not 0.785?

Math.Tanh does some different.

It is Math.Atan you want !

Arne

So to start a fire...

so u expect math.Atan(1)*4 to return the complete PI,
3.141592653589.... and so on for all eternity... tell the computer how
it should be stored and presented...

heard there should be a circle somwhere if u print it (PI) with a 80
char/row printer for a couple of years... newer got around to that
though...

//CY

[Hans Kesting]

heard there should be a circle somwhere if u print it (PI) with a 80

char/row printer for a couple of years... newer got around to that
though...

That's from the novel "Contact" by Carl Sagan and (if I remember
correctly) you should use base 11.
I doubt if it is true but given an infinite amount of "random" numbers,
anything could happen.

Hans Kesting

[=?ISO-8859-1?Q?Arne_Vajh=F8j?=]

Ben Voigt [C++ MVP] wrote:

Everyone believes that PI is irrational,

It has been proven to be both irrational and transcendent.

Arne