Raisinghania, M.D. and Aggarwal, R.S. <br/><br/>
A Text Book on Trigonometry 

 - New Delhi  S.Chand & Company Ltd.  1983 
 - 144 
<br/><br/><label>Publisher. No.: </label> Gangarams Book Bureau 
<br/><br/><label>Subjects--Personal Names: </label> Mathematics 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics