Ayers, Frank <br/><br/>
Theory and problems of plane and spherical trignometry 

 - New york  McGraw-Hill  1954 
<br/><br/><label>Subjects--Index Terms: </label>Angels and arc length  Trigonometric equations  Logarithmic solutions of right triangles  Complex numbers 
<br/><br/><label>Dewey Class. No.: </label>516.24