HP 35s HP 35s scientific calculator - User Guide - Page 87

Time Conversions The HP 35s can convert between decimal and hexagesimal formats for numbers. This is especially useful for time and angles measured in degrees. For example, in decimal format an angle measured in degrees is expressed as D.ddd..., while in hexagesimal the same angle is represented as D.MMSSss, where D is the integer pat of the degree measure, ddd... is the fractional part of the degree measure, MM is the integer number of minutes, SS is the integer part of the number of seconds, and ss is the fractional part of the number of seconds. To convert between decimal format and hours minutes, and seconds: 1. Enter the number you wish to convert 2. Press to convert to hours/degrees, minutes, and seconds or press 5 to convert back to decimal format. Example: Converting Time Formats. How many minutes and seconds are there in 1/7 of an hour? Use FIX 6 display format. Keys: 8   8 Display: Description: Sets FIX 6 display format. 1/7 hour as a decimal fraction. Equals 8 minutes and 34.29 seconds. Restores FIX 4 format. Angle Conversions When converting to radians, the number in the x-register is assumed to be degrees; when converting to degrees, the number in the x-register is assumed to be radians. Real-Number Functions 4-13