Arcsine and Arccosine Subroutines for PDP-1

This document, dated November 22, 1960, outlines the Arcsine and Arccosine subroutines for the PDP-1. It describes the binary point placement, argument ranges (from -1.0 to +1.0), and the resulting radian outputs. It specifies the calling sequence using LIO and JSP instructions and provides the assembly-level subroutine listings, including dependencies on other math routines like "modified multiply" and square root functions. The document concludes with an acknowledgment to Chas. W. Adams Associates, Inc. for supplying these routines.