Gustafson, R. David  1936- <br/><br/>
Plane trigonometry / 
R. David Gustafson, Peter D. Frisk. 
 - 2nd ed. 
 - Monterey, Calif. :  Brooks/Cole Pub. Co.,  1985. 
 - xiii, 288, 88 p. :  ill. 
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>0534036066 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Plane trigonometry.