System Functions

COS( )

Return Cosine

Format

COS(num[,ERR=stmtref])

Where:

num

Numeric expression whose Cosine 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

Value between -1 and +1.

Description

The COS( ) function returns the Cosine of the numeric expression. It returns a value between -1 and +1, rounded to the current PRECISION in effect. ACS( ) is its inverse function.

Example

print 'CS'
X=0,Y=80
LASTX=0,LASTY=80
for I=-20 to 1 step .5
     X=X+25
     Y=50*cos(I)+80
     print 'line'(LASTX,LASTY,X,Y)
     LASTX=X
     LASTY=Y
next