Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.1 6/24/83; site mgweed.UUCP Path: utzoo!linus!decvax!harpo!eagle!mhuxl!houxm!ihnp4!we13!mgweed!rjr From: rjr@mgweed.UUCP (Bob Roehrig) Newsgroups: net.math Subject: need help Message-ID: <6686@mgweed.UUCP> Date: Tue, 31-Jan-84 12:21:53 EST Article-I.D.: mgweed.6686 Posted: Tue Jan 31 12:21:53 1984 Date-Received: Sun, 5-Feb-84 04:09:18 EST Organization: AT&T Consumer Products - Montgomery Illinois Lines: 10 Perhaps some math whiz can help me out with a problem. I have a computer program that gives me an answer that is the sin of x. How can I get the value of x without an arc-sin function? My computer just has sin, cos, tan and arc-tan. (I also have the formula ACS(x)=-ATN(x/sqr(-x*x+1))+pi/2 which gives me the arc-cosine function). Tnx Bob