Yang Desheng <br/><br/>
Trigonometric Functions and Complex Numbers: in Mathematical Olympiad and Competitions 

 -  WCPC  World Scientific  2016 
<br/><br/><label>ISBN: </label>9781938134876 
<br/><br/><label>Source: </label>EBOOK 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics