& sin()
 
  Syntax: sin(<number>)
 
  Returns the sine of <number>, expressed in radians.
 
  Examples:
  > say sin(0)
  You say "0"
  > say sin(fdiv(pi(),2))
  You say "1"
  > say sin(fdiv(pi(),4))
  You say "0.707107"
  > say sin(fdiv(pi(),6))
  You say "0.5"
 
	See Also: acos(), asin(), atan(), cos(), pi(), tan()