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Returns the arc cosine of a number. The arccosine is the angle and its cosine is the number. The returned angle value is expressed in radians and ranges from 0 to pi.
Syntax
ACOS(number)
Number The cosine value of the angle, which must be between -1 and 1.
Description
If you want to express the arc cosine value in degrees, please multiply the result by 180/PI() or use the DEGREES function.
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