COS Function

COS(real-expression)

Returns the cosine of the given angle, where the angle is expressed in radians.

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Examples

PRINT COS(0)

Produces 1.

PRINT COS(PI# / 2)

Produces approximately 0.

PRINT COS(PI#)

Produces -1.

REM Plot cosine values for multiples of 45 degrees
FOR d = 0 TO 360 STEP 45
    r# = d * PI# / 180
    PRINT "COS("; d; "°) = "; COS(r#)
NEXT

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Notes

• Argument is in radians. Convert degrees to radians with:

  radians# = degrees * PI# / 180

• Return value is a real number between -1 and 1.
• Related inverse function: ACS.

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See also: SIN · TAN · ACS · ATAN