Classical trigonometry calls the separation between two lines an "angle", which is the length of a circular arc between two lines.

Revise trigonometric ratios of sine, cosine and tangent and calculate angles in right-angled triangles with this Bitesize GCSE Maths Edexcel guide.

Learn and revise trigonometric ratios of sine, cosine and tangent and calculate angles and lengths in right-angled triangles with GCSE Bitesize AQA Maths.

Object Details maker Wheeler, Albert Harry Description The sheets in this folder hold patterns for the following models for spherical trigonometry: Bi-Rectangular Spherical Triangle -- (B R)ST dated ...

The Trisection of the Angle by Plane Geometry: Verified by Trigonometry with Concrete Examples. By Dr. J. Whiteford. Pp. 169.