• MORE TRIGONOMETRIC IDENTITIES MAIN SUBJECT CLASSIFICATION: MATHEMATICS EDUCATION 97 G60 PLANE AND SPHERICAL TRIGONOMETRY

Abstract

There are certain trigonometric identities which look formidable and intimidating from the point of view of their solutions and appear tedious and cumbersome also. In ordinary ways, these seem practically unsolvable until we know the exact method to solve these. Most of the identities being considered here, according to me, are not known earlier and do not find mention in textbooks but attempt has been made to present and solve these by applying unique and different methods. Trigonometric ratios of sine and cosine are expandable in series expansion and also their multiple angles are expressible in single angle but their finite product is hardly found in textbooks, however, infinite product is......