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Grammar
ACOS(number)
Returns the arccosine, namely inverse cosine, of a number. The arccosine value is an angle returned in radian format.
Parameter
number
Cosine of the angle you want.
The function supports only one number and returns illegal if more than one numbers are set.
The parameter must range from - 1 to 1. The returned angle value is between 0 and PI. To display the returned angle in degrees, multiply it by 180/PI().
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