Mowaffaq Hajja
Abstract
ABSTRACT. In this note, we describe a method for establishing trigonometric inequalities that involve symmetric functions in the cosines of the angles of a triangle. The method is based on finding a complete set of relations that define the cosines of such angles.
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ABSTRACT. In this note, we describe a method for establishing trigonometric inequalities that involve symmetric functions in the cosines of the angles of a triangle. The method is based on finding a complete set of relations that define the cosines of such angles.
Key concepts: Mathematics, Trigonometry, Direction cosine, Trigonometric functions, Set (abstract data type), Inequality, Pythagorean trigonometric identity, Algebra over a field