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This function calculates the arccosine, that is, the angle whose cosine is the specified value.
ACOS( *value)
For the argument, you can specify the cosine of the angle you want to return, which must be a value between –1 and 1.
The result angle is in radians between 0 (zero) and PI (pi). If you want to convert the result to degrees, multiply the result by 180/PI.
Accepts numeric data. Returns numeric data.
ACOS(B3)
ACOS(R3C2)
ACOS(0.5)
gives the result 1.0471975512