Trigonometry Booster with Problems & Solutions

Book Preface

Trigonometry (from Greek trigonon “triangle” + metron “measure”) is a branch of mathematics that studies triangles and the relationships of the lengths of their sides and the angles between those sides.

Trigonometry defines the trigonometric functions, which describe those relationships and have applicability to cyclical phenomena, such as waves. This field, evolved during the third century BC as a branch of geometry, was used extensively for astronomical studies. It is also the foundation of the practical art of surveying.

Trigonometry basics are often taught in school either as a separate course or as part of a pre-calculus course. The trigonometric functions are pervasive in parts of pure mathematics and applied mathematics such as Fourier analysis and the wave equation, which are in turn essential to many branches of science and technology.