Use

The Acos() function returns the arccosine of a given unitless number. The result is given in radians, but it can be converted to degrees using "to deg".

Acos() also works with complex numbers.

Examples of trig arc functions

• Acos(pi/4)  = .667 rad
• Acos(0.5) to deg  = 60 deg
• Atan(3ft/5ft)  = 0.540 rad
• Asin(-1 + 2i)  = (-0.427 + 1.529 i) rad

 

 

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Function

Acos(number) number

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