System Functions

ASN( )

Return Arc-Sine

Format

ASN(num[,ERR=stmtref])
 
Where:

num

Numeric expression (range -1 to +1) whose Arc-Sine is to be returned.

stmtref

Program line number or statement label to which to transfer control.

Note:
The value to be supplied must be in Radians, not Degrees. To convert Degrees to Radians:

   Radians = Degrees * pi / 180
   Degrees = Radians * 180 / pi

Returns

Numeric value, range -ð/2 to +ð/2.

Description

The ASN( ) function returns the Arc-Sine of the given numeric expression num. The function returns a value between -ð (negative pi) divided by 2 and +ð (+pi) divided by 2, rounded to the current PRECISION in effect. This is the inverse of the SIN( ) function.

If num is not in the range -1 to +1 inclusive, the result will be Error #40: Divide check or numeric overflow.

Example

for I=-1 to 1 step .1
     print asn(I),
next
print "DONE"
end

->run
-1.57-1.12-0.93-0.78-0.64-0.52-0.41-0.3-0.2-0.1 0 0.1 0.2 0.3 0.41 0.52 0.64 0.7 8 0.93 1.12 1.57 DONE