If the calculator is in radian mode, the ° (degree) symbol converts an angle to radians.

*angle*°

Press:

- [2nd]
- [Angle]
- [Enter] or [1]

TI-83/84/+/SE

1 byte

Normally, when the calculator is in radian mode, the trigonometric functions only return values calculated in radians. With the ° symbol you can have the angle evaluated as if in degree mode because it converts the angle into radians.

One full rotation around a circle is 2π radians, which is equal to 360°. To convert an angle in radians to degrees you multiply by 180/π, and to convert from degrees to radians multiply by π/180.

In radian mode:

```
sin(45) \\ actually calculating sin(2578.31)
.8509035245
sin(45°)
.7071067812
```

In degree mode:

```
sin(45)
.7071067812
sin(45°)
.7071067812 \\ There's no difference when in degrees
```

# Optimization

When you only call the trig function once in a program and want it calculated in degrees, instead of changing the mode you can just use ° to save one-byte (the newline from using the command Degree)

```
:Degree
:sin(X)
can be
:sin(X°)
```

# Related Commands

^{r}(radian symbol)

.