calc: Angular Modes
7.4.1 Angular Modes
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The Calculator supports three notations for angles: radians, degrees,
and degrees-minutes-seconds. When a number is presented to a function
like ‘sin’ that requires an angle, the current angular mode is used to
interpret the number as either radians or degrees. If an HMS form is
presented to ‘sin’, it is always interpreted as degrees-minutes-seconds.
Functions that compute angles produce a number in radians, a number
in degrees, or an HMS form depending on the current angular mode. If
the result is a complex number and the current mode is HMS, the number
is instead expressed in degrees. (Complex-number calculations would
normally be done in Radians mode, though. Complex numbers are converted
to degrees by calculating the complex result in radians and then
multiplying by 180 over ‘pi’.)
The ‘m r’ (‘calc-radians-mode’), ‘m d’ (‘calc-degrees-mode’), and ‘m
h’ (‘calc-hms-mode’) commands control the angular mode. The current
angular mode is displayed on the Emacs mode line. The default angular
mode is Degrees.
Info Catalog
calc: Calculation Modes
calc: Calculation Modes
calc: Polar Mode