Hebborn, J. E. <br/><br/>
Methods of trigonometry 
J.E. Hebborn, C. Plumpton. 
 - London  Macmillan Education  1984 
 - viii,39p.  ill.  24 cm. 
 - Core books in advanced mathematics .
<br/><br/>Includes index. 
<br/><br/><label>ISBN: </label>0333365372  RM7.31 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Trigonometry.