Plane trigonometry


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Related to Plane trigonometry: spherical trigonometry
the branch of trigonometry in which its principles are applied to plane triangles.
those branches of trigonometry in which its principles are applied to plane triangles and spherical triangles respectively.

See also: Plane, Trigonometry

Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in periodicals archive ?
Elements of plane trigonometry. London & New York: Macmillan.
The more esoteric the topic, such as al-Kindi on optics or Ibn al-Haytham on plane trigonometry, the less likely a published study would be found in major journals dealing with Islam.
The primary objective is to inspire undergraduate calculus and analytic geometry students by applying the basic theory, together with some basic plane trigonometry, to a real life problem: On a given day of the year and at a given latitude, for how many hours will the top rim of the sun be visible?