Algebra
Degrees against radians
The angle unit converts an angle between the two conventions. A trigonometric function applies its argument in whichever unit the calculator is currently set to.
The Formula
radians = degrees x pi / 180
The angle unit converts an angle between the two conventions. A trigonometric function applies its argument in whichever unit the calculator is currently set to.
| Symbol | Meaning | Unit | Notes |
|---|---|---|---|
| deg | Angle in degrees | degrees | The angle measured in a 360 part turn. |
| rad | Angle in radians | radians | The same angle measured in a two pi turn. |
What Each Symbol Means
degdegrees
Angle in degrees
The angle measured in a 360 part turn.
radradians
Angle in radians
The same angle measured in a two pi turn.
See It Worked With Real Numbers
A formula on its own does not tell you which number goes where. The how to use a scientific calculator page applies this equation to a concrete case, shows every intermediate step, and names the mistakes that produce a wrong answer even when the algebra is right.
Where This Formula Appears
This equation is the working core of How To Use A Scientific Calculator, filed under Math. Every number the guide produces comes from substituting into this one line.