"Simmonds, Ashley (PTB)" wrote: > so does anyone know how to do the arcsine calculation in Access/VB? it's > probably really easy, but i'm no trig guru, i really struggled to get this > far.
It's really easy. Do you have atan2()? If so, use asin(x)=atan2(x,sqrt(1-x^2))} asin returns a value in the range -pi/2 <= asin <= pi/2 If all you have is atan() then use: asin(x)=2*atan(x/(1+sqrt(1-x*x))) Read the details at http://williams.best.vwh.net/avform.htm#Math -- - Bill Thoen ------------------------------------------------------------ GISnet, 1401 Walnut St., Suite C, Boulder, CO 80302 tel: 303-786-9961, fax: 303-443-4856 mailto:[EMAIL PROTECTED], http://www.gisnet.com ------------------------------------------------------------ --------------------------------------------------------------------- List hosting provided by Directions Magazine | www.directionsmag.com | To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] Message number: 2356
