ArcCos

Help Contents Arithmetic Trigonometric Functions ArcCos
radArcSin radArcCos

ArcCos x

outputs the arcus cosine of its input. The result is in degrees.

Examples: 

ArcCos 1		;0  ;-)
ArcCos (Sqrt 3)/2		;30  ;-)
ArcCos 1/Sqrt 2		;45  ;-)
ArcCos 1/2		;60  ;-)
ArcCos 0		;90  ;-)
ArcCos (list 1 (Sqrt 3)/2 1/Sqrt 2 1/2 0)		;[0 30 45 60 90] ;-)

References:

radArcSin radArcCos