TRIGONOMETRY
\tɹˌɪɡənˈɒmətɹi], \tɹˌɪɡənˈɒmətɹi], \t_ɹ_ˌɪ_ɡ_ə_n_ˈɒ_m_ə_t_ɹ_i]\
Definitions of TRIGONOMETRY
 2006  WordNet 3.0
 2011  English Dictionary Database
 2010  New Age Dictionary Database
 1913  Webster's Revised Unabridged Dictionary
 1919  The Winston Simplified Dictionary
 1899  The american dictionary of the english language.
 1894  The Clarendon dictionary
 1919  The Concise Standard Dictionary of the English Language
 1914  Nuttall's Standard dictionary of the English language
 1871  The Cabinet Dictionary of the English Language
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the mathematics of triangles and trigonometric functions
By DataStellar Co., Ltd

Mathematics which treats of the relations between the sides and angles of triangles; a text treating of this science.

Trigonometric, trigonometrical.

Trigonometrically.
By William Dodge Lewis, Edgar Arthur Singer

Trigonometrically.

The branch of mathematics which treats of the relations between the sides and angles of triangles.
By Daniel Lyons

Science which treats of triangles and their measurement.

Trigonometrical.
By William Hand Browne, Samuel Stehman Haldeman
By James Champlin Fernald