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REBOL 3 Functions: arccosine

arccosine  value  /radians

Returns the trigonometric arccosine (in degrees by default).


value [number!]


/radians - Returns result in radians

See also:

arcsine   arctangent   cosine   exp   log-10   log-2   log-e   power   sine   square-root   tangent  


The arccosine provides the inverse of the cosine function.

print arccosine .5

Note that arccosine goes to infinity at 90 degrees and will cause a numeric overflow.

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