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trigonometry

```  3  definitions  found

From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]:

Trigonometry  \Trig`o*nom"e*try\,  n.;  pl  {-tries}.  [Gr.  ?  a
triangle  +  -metry:  cf  F.  trigonom['e]trie.  See  {Trigon}.]
1.  That  branch  of  mathematics  which  treats  of  the  relations
of  the  sides  and  angles  of  triangles,  which  the  methods  of
deducing  from  certain  given  parts  other  required  parts
and  also  of  the  general  relations  which  exist  between  the
trigonometrical  functions  of  arcs  or  angles.

2.  A  treatise  in  this  science.

{Analytical  trigonometry},  that  branch  of  trigonometry  which
treats  of  the  relations  and  properties  of  the
trigonometrical  functions.

{Plane  trigonometry},  and  {Spherical  trigonometry},  those
branches  of  trigonometry  in  which  its  principles  are
applied  to  plane  triangles  and  spherical  triangles
respectively.

From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]:

Mathematics  \Math`e*mat"ics\,  n.  [F.  math['e]matiques,  pl.,  L.
mathematica,  sing.,  Gr  ?  (sc.  ?)  science.  See  {Mathematic},
and  {-ics}.]
That  science,  or  class  of  sciences,  which  treats  of  the  exact
relations  existing  between  quantities  or  magnitudes,  and  of
the  methods  by  which  in  accordance  with  these  relations,
quantities  sought  are  deducible  from  other  quantities  known
or  supposed;  the  science  of  spatial  and  quantitative
relations.

Note:  Mathematics  embraces  three  departments,  namely:  1.
{Arithmetic}.  2.  {Geometry},  including  {Trigonometry}
and  {Conic  Sections}.  3.  {Analysis},  in  which  letters
are  used  including  {Algebra},  {Analytical  Geometry},
and  {Calculus}.  Each  of  these  divisions  is  divided  into
pure  or  abstract,  which  considers  magnitude  or  quantity
abstractly,  without  relation  to  matter;  and  mixed  or
applied,  which  treats  of  magnitude  as  subsisting  in
material  bodies,  and  is  consequently  interwoven  with
physical  considerations.

From  WordNet  r  1.6  [wn]:

trigonometry
n  :  the  mathematics  of  triangles  and  trigonometric  functions
[syn:  {trig}]
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