The 'acos' function returns a cosine value(=radian).
double @acos(double d);
Parameters
double d : Value that you want to calculate ( -1 <= d <= 1 )
Return Value
radian ( 0 ¡Â ¥è ¡Â ¥ð )
Example
value = @acos(0.5);
Description : The cosine value of '0.5' is stored in the variable named 'value'.
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