Java Development

[Raiden]

Hello guys
Black Berry JDE hasn't some trigonometrical functions. For example : asin (arc sine), atan (arc tangent) .. etc.
I need to calculate asin(x). But I don't know how ?
How to solve this action ?

Plz help me. I need ur support a lot.
Tnx'

[Ivanov]

I've posted that some times ago on the old BB forum:

This might work. Was used long time ago in OpenOffice:

Function ArcSin( x )
ArcSin = Atn( x / Sqr(-x * x + 1) )
End Function

Function ArcCos( x )
ArcCos = ArcSin( Sqr( 1 - x^2 ) )
End Function

Next problem is that there is no atan in the API...
Found that in wikipedia:

if abs(x) <= 1:
atan(x) = x/(x+0.28 * x^2)
if x > 1:
atan(x) = PI/2 - x/(x^2 + 0.28)

according to wiki is the max calc. difference under 0,005 Rad