# Some Facts about Trigonometry and Euclidean Geometry

Formalized Mathematics (2014)

- Volume: 22, Issue: 4, page 313-319
- ISSN: 1426-2630

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topRoland Coghetto. "Some Facts about Trigonometry and Euclidean Geometry." Formalized Mathematics 22.4 (2014): 313-319. <http://eudml.org/doc/270835>.

@article{RolandCoghetto2014,

abstract = {We calculate the values of the trigonometric functions for angles: [XXX] , by [16]. After defining some trigonometric identities, we demonstrate conventional trigonometric formulas in the triangle, and the geometric property, by [14], of the triangle inscribed in a semicircle, by the proposition 3.31 in [15]. Then we define the diameter of the circumscribed circle of a triangle using the definition of the area of a triangle and prove some identities of a triangle [9]. We conclude by indicating that the diameter of a circle is twice the length of the radius},

author = {Roland Coghetto},

journal = {Formalized Mathematics},

keywords = {Euclidean geometry; trigonometry; circumcircle; right-angled},

language = {eng},

number = {4},

pages = {313-319},

title = {Some Facts about Trigonometry and Euclidean Geometry},

url = {http://eudml.org/doc/270835},

volume = {22},

year = {2014},

}

TY - JOUR

AU - Roland Coghetto

TI - Some Facts about Trigonometry and Euclidean Geometry

JO - Formalized Mathematics

PY - 2014

VL - 22

IS - 4

SP - 313

EP - 319

AB - We calculate the values of the trigonometric functions for angles: [XXX] , by [16]. After defining some trigonometric identities, we demonstrate conventional trigonometric formulas in the triangle, and the geometric property, by [14], of the triangle inscribed in a semicircle, by the proposition 3.31 in [15]. Then we define the diameter of the circumscribed circle of a triangle using the definition of the area of a triangle and prove some identities of a triangle [9]. We conclude by indicating that the diameter of a circle is twice the length of the radius

LA - eng

KW - Euclidean geometry; trigonometry; circumcircle; right-angled

UR - http://eudml.org/doc/270835

ER -

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