Trigonometric Functions and Complex Numbers covers the followings areas in the International Mathematical Olympiad (IMO) and other mathematical competitions. Trigonometric identity, graphs and ...

In this book, trigonometry is presented mainly through the solution of specific problems. The problems are meant to help the reader consolidate their knowledge of the subject. In addition, they serve ...

Hours after an escalator at the United Nations stopped abruptly as US President Donald Trump and First Lady Melania Trump stepped onto it, the organisation said it may have resolved the mystery behind ...