Trigonometric functions

[Aceguy]

why doesnt

tan(45)

=1

[Mat]

google tan(45)

tan(45) = 1.61977519

run a test in autoit you get exactly the same response.

you are probably asking the wrong question.

this is what you want...

$pi = 3.14159265358979323846264338327950288419716939937510
$Result = Tan(45 * $pi/180)
MsgBox (48, "Test2", $Result)

edited the code to include pi to 50 dec places, or else it returns 0.99999999

BINGO!!

1° = pi / 180 radians.

Note that Tan is "infinite" for ... -3PI/2, -PI/2, PI/2, 3PI/2, 5PI/2, ... and tends to return 1.63317787283838e+016 for such multiples of Pi-halves.

Edited April 17, 2009 by mdiesel

[nitekram]

why doesnt

tan(45)

=1

cause it does not take degrees

EDIT

tan(45 degrees) = 1

Edited April 17, 2009 by nitekram

[monoceres]

For easy convertion between degrees and radians, look at the following functions in Math.au3

_Radian()

_Degree()

[Mat]

Why does everyone want to know about trig all of sudden?

@Monoceres

WOW! never noticed those, have been using

rad * $pi/180 = deg

[Aceguy]

thanks guys.. i know 0/0 about trigernometry

[Mat]

0 divided by 0

the answer is as of yet, undefined, it could be anything except infinity...infinitys a silly number.

Maths mood in the holidays? What am i doing??!!!!

no probs, ace : any volounteers for making it even easier by making a TanD function?? shouldn't be too hard, just use tan with a conversion at the beginning...

[Aceguy]

so

tan(_Radian(45))

Edited April 17, 2009 by Aceguy

[monoceres]

so is there a beter way....

tan(_degree(45)) or something.??

If you want to work with degrees that is the way to go.

However working with radians is much better since degrees is a retarded unit. Really.

90°= π/2

180°= π/

360°= 2π

More here.

[Aceguy]

got it

#include<math.au3>
$ss=tan(_Radian(3))*54
ConsoleWrite($ss)

will give me 2.83

i have a distance(54mm), and angle(3 degrees) and needed to know the rise.?

[UEZ]

got it

#include<math.au3>
 $ss=tan(_Radian(3))*54
 ConsoleWrite($ss)

will give me 2.83

i have a distance(54mm), and angle(3 degrees) and needed to know the rise.?

Try this:

$c = 54 ;mm
$alpha = 3 ;degrees
$a = Sin($alpha / 180 * 3.1415926535897932384626) * $c
$b = Cos($alpha / 180 * 3.1415926535897932384626) * $c

$rise = $a / $b

MsgBox(0, "Math", $rise)

$a and $b are perpendicular to each other.

UEZ

Edited April 18, 2009 by UEZ