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Property Value
Hex Value $0A
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Localizations
  • FR: ʳ

ʳ

Overview

Availability: Token available everywhere.

Syntax

ʳ

Description

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

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 degree mode:

sin(π)        \\sine of Pi degrees
    .0548036651
sin(π^^r)
    0

In radian mode:

sin(π)
    0
sin(π^^r)
    0        \\There's no difference when in radians

Optimization

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

:Radian
:sin(X)
can be
:sin(X^^r)
  • ° (degree symbol)

Source: parts of this page were written by the following TI|BD contributors: burr, DarkerLine, GoVegan, Myles_Zadok.

History

Calculator OS Version Description
TI-82 1.0 Added
Authors: Adrien Bertrand