advr.hlp (Topic list)
Important Notice
The pages on this site contain documentation for very old MS-DOS software, purely for historical purposes. If you're looking for up-to-date documentation, particularly for programming, you should not rely on the information found here, as it will be woefully out of date.
COS, SIN, and TAN Functions Details
  Summary  Details  Example                Contents  Index  Back
──────────────────────────────────────────────────────────────────────────────
 COS(angle)
 SIN(angle)
 TAN(angle)
 
 Usage Notes
   ■ The cosine of an angle in a right triangle is the ratio between the
     length of the side adjacent to the angle and the length of the
     hypotenuse.
 
   ■ The sine of an angle in a right triangle is the ratio between the
     length of the side opposite the angle and the length of the
     hypotenuse.
 
   ■ The COS, SIN, and TAN functions are calculated in single precision if
     numeric-expression or angle is an integer or single-precision value.
     If you use any other numeric data type, they are calculated in double
     precision.
 
   ■ TAN (tangent) is the inverse of ATN (arctangent).
 
   ■ The tangent of an angle (the value returned by TAN) in a right triangle
     is the ratio between the length of the side opposite an angle and the
     length of the side adjacent to it.
 
   ■ To convert values from degrees to radians, multiply the angle (in
     degrees) by pi/180 (or .0174532925199433) where pi = 3.141593.
 
   ■ To convert a radian value to degrees, multiply radians by 180/pi (or
     57.2957795130824).
 
   ■ Pi has the following approximate value:
 
         pi = 3.14159265359     or     pi = 4.0 * ATN(1.0)