POSITION:028,114
COLOUR:STANDARD
TEXT:00,The first three library routines accept an atom or a sequence value,  ,
COLOUR:POINTS
TEXT:00,                                                                     o
COLOUR:STANDARD
TEXT:16,that is an angle (in radians), and returns the appropriate value in
TEXT:16,variable   . The last accepts an atom or sequence value that represents
COLOUR:POINTS
TEXT:00,         ro
COLOUR:STANDARD
TEXT:16,a tangent and returns an angle atom or sequence, measured in radians.
TEXT:32,These library routines come in handy for work in trigonometry, such as
TEXT:16,using the law of sines and the law of cosines to determine the length
TEXT:16,of a side of a triangle, or to generate a sine wave on a plane graph.
TEXT:16,Because trigonometry is a subject out of the scope of this tutorial, we
TEXT:16,will focus on them long enough just to let you know about them. If you
TEXT:16,are not familiar with trigonometry, these library routines will not be
TEXT:16,of any interest to you. They are not mandatory to know in order to learn
TEXT:16,how to program in Euphoria.
TEXT:32,This concludes our introduction to math library routines in Euphoria. The
TEXT:16,next chapter will show you how to work with files and devices.

