Galicano- Adanza, Estela; Padua, Roberto,  c2003. <br/><br/>
Plane Trigonometry / 
Galicano- Adanza, Estela; Padua, Roberto. 
 - rev.ed. 
 - 172p. :  bibliography, index ;  25.4 cm. 
<br/><br/><label>ISBN: </label>9712314677 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Trigonometry--Bulacan, Philippines--2003--newsprint.