The functions housed in the Angle menu on the TI-83 Plus graphing calculator allow you to convert between degrees and radians and from radians to degrees. To convert degrees to radians, follow these steps:

1. Put the calculator in Radian mode.

2. If necessary, press [2nd][MODE] to access the Home screen.

3. Enter the number of degrees.

4. Press [2nd][APPS][1] to paste in the degree function. (On the TI-83, press [2nd][MATRX][1].)

5. Press [ENTER] to convert the degree measure to radians.

If you’re a purist who likes to see radian measures expressed as a fractional multiple of

whenever possible, continuing with the following steps accomplishes this goal if it’s mathematically possible.

6. Press

to divide the radian measure by

7. Press [MATH][1][ENTER] to convert the result to a fraction, if possible.

If the calculator can’t convert the decimal obtained in Step 6 to a fraction, it says so by returning the decimal in Step 7.

1. Put the calculator in Degree mode.

2. If necessary, press [2nd][MODE] to access the Home screen.

If the radian measure is entered as an arithmetic expression, surround that expression with parentheses.

4. Press [2nd][APPS][3] to paste in the r function.

5. Press [ENTER] to convert the radian measure to degrees.