Solution 10578: Degree, Minutes, Seconds (DMS) Conversions with the TI-82.
How do I perform degrees, minutes, seconds (DMS) conversions using the TI-82?
The TI-82 recognizes a number in DMS when that number is entered using a single quote after each value. For example, to convert 15 degrees, 12 minutes and 8 seconds to decimal degrees, input 15'12'8' and press [ENTER]. The ' is accessed by pressing [2nd] [ANGLE] .
To convert a number that is written in decimal degrees to DMS, follow the example below:
Convert 12.2525 to Degrees, Minutes and Seconds
• Input 12.2525.
• Press [2nd] [MATRIX] to access the angle menu.
• Press  for the >DMS command.
• Press [ENTER].
The calculator will display 12º 15' 9".
Please see the TI-82 guidebook for additional information.