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Trigonometric functions: Difference between revisions
→{{header|R}}: Added REBOL example.
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print( c( acos(C), acosd(C) ) )
print( c( atan(T), atand(T) ) )</lang>
=={{header|REBOL}}==
<lang REBOL>REBOL [
Title: "Trigonometric Functions"
Author: oofoe
Date: 2009-12-07
URL: http://rosettacode.org/wiki/Trigonometric_Functions
]
radians: pi / 4 degrees: 45.0
; Unlike most languages, REBOL's trig functions work in degrees unless
; you specify differently.
print [sine/radians radians sine degrees]
print [cosine/radians radians cosine degrees]
print [tangent/radians radians tangent degrees]
d2r: func [
"Convert degrees to radians."
d [number!] "Degrees"
][d * pi / 180]
arcsin: arcsine sine degrees
print [d2r arcsin arcsin]
arccos: arccosine cosine degrees
print [d2r arccos arccos]
arctan: arctangent tangent degrees
print [d2r arctan arctan]</lang>
Output:
<pre>0.707106781186547 0.707106781186547
0.707106781186548 0.707106781186548
1.0 1.0
0.785398163397448 45.0
0.785398163397448 45.0
0.785398163397448 45.0</pre>
=={{header|Ruby}}==
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