There's no DMS button and I need to convert minutes and seconds to degrees. How do I do this?

Use the DMS key marked degree, apostrophe, double quotation mark.
Lets us call it [DMS]
To enter an angle in degree minutes seconds or hour, minutes, seconds, type in the number of degrees, press the [DMS] key, enter the number of seconds, press the [DMS] key, enter the number of seconds then the [DMS] key. Press = the calculator displays the value in DMS units. If you press the DMS key again the number displayed is converted to decimal degrees.
Example:enter 12 degrees, 15 minutes, and 25 seconds
12 [DMS]15[DMS]25[DMS] =
Calculator displays 12 deg 15'25"
Press the DMS key again and you see 12.2569444

Press the DMS button to convert between decimal degrees and degrees-minutes-seconds.
The DMS button is marked with the degree, minute, and second symbols. It's located above the [ENG] key, which is located above the [8] key.
For full details, start with the "Degree, Minute, Second (Sexagesimal) Calculations" section beginning on page E-22 of the manual. If you need a manual, you may download a copy here.

Yes. Pressing the DMS key (two keys above the 8 key) when a result is displayed toggles the result between decimal degrees and degrees-minutes-seconds.

For example, to convert 3.5 degrees, press 3 . 5 = and you'll see 3.5. Now press DMS and you'll see 3 degrees 30 minutes 0 seconds.

Enter it as DD.MMSS and then press 2nd [DMS-DD] to convert it to decimal for further calculations.

For example, to enter 21 degrees 34 minutes 45 seconds, enter 21.3445 then press 2nd [DMS-DD].

Enter the number of degrees, press DMS, enter the number of minutes, press DMS, enter the number of seconds, press DMS. Press S--D. If you get a fraction, press S--D again.

DMS is the degrees-minutes-seconds button located above the ENG button, S--D is the symbolic--decimal button located above the DEL button.

To enter an angle in DMS format, enter the number of degrees, 2ND [ANGLE] 1 to indicate degrees, enter the number of minutes, 2ND [ANGLE] 2 to indicate minutes, enter the number of seconds, ALPHA ["], then ENTER.

ANGLE is on the APPS key, " is on the + key.

You can convert an angle from decimal to DMS with the ->DMS command, 2ND [ANGLE] 4

The DMS symbols are available under the ANGLE menu
Press [2nd][APPS] (ANGLE)
Under that menu you find the degree and minute symbol. To enter the seconds unit you use the key sequence [ALPHA][+] (")
To enter 1deg 15 minutes and 37 seconds
1 [2nd][APPS] [1:deg] 15[2nd][Apps][2:'] 37 [ALPHA] [+]

To enter a number in decimal degrees (eg 15.37)

1. If angle unit is the degree just enter 15.37
   
2. If angle unit is the radian , you must specify the angle unit as degrees: To enter 15.37 degrees you type 15.37 [2nd][Apps][1: degree] [ENTER].

To convert from DMS to DD and from DD to DMS, you use the sequence [2nd][Apps][4:|=>DMS].

Hello,
To convert an angle from degrees (decimal degrees) to the sexagesimal notation (deg, min, seconds) use the key [DMS] the one between [(-) and [hyp].
Everytime you press the key, the displayed result is cast in the other form
EX; 12.58 [DMS] gives 12 deg 34 min 48 sec.
Suggestion: If you are doing many calculations with the sexagesimal format, use the decimal degree format, and only when you find the final result do you convert it to DMS.
Hope it helps.

Hello,
With the TI8x/TI8xPlus you can enter an angle in degrees (Angle mode must be set to degrees) and convert it into DMS representation the following way. Exemple
18.675 [2nd][ANGLE][4] [ENTER] gives 18deg 40' 30''
If Angle [MODE] is set to degrees you can enter a number in radians and convert it into degrees. Exemple How many degrees are ther in 1rad ?
[1][2nd][ANGLE][3] display 1 with a small r as superscrit. Pressing [ENTER] yields 57.29577951

To convert 1rad into DMS, takes a little effort but can be done: you have
to convert radians to degrees and the result [ANS] into DMS.

You cannot use an angle written in DMS in any calculation.
But if you want to convert an angle from degrees to radians enter your number and divide by 57.29577951

Hope it helps

No DMS button

1degree 22.25 minutes
2nd Math F3 1 F1 22 f3 15 f3 enter