Olvido, Lucrecia R. <br/><br/>
Pre-calculus (for senior high school) / 
Lucrecia R. Olvido [and three others] 
 - Mandaluyong City :  Books Atbp. Publishing Corp.,  c2016. 
 - viii, 245 pages :  25 cm. 
<br/><br/>Includes references. 
<br/><br/>Chapter One. Conics -- Chapter Two. Systems of nonlinear equations -- Chapter Three. Series and mathematical induction -- Chapter Four. Trigonometric (circular) functions -- Chapter Five. The trigonometric identities -- Chapter Six. The inverse trigonometric functions -- Chapter Seven. Polar coordinates -- References. 
<br/><br/><label>ISBN: </label>9786214090471