Trigonometry

1941

Marvin L. Bittinger has been teaching math at the university level for more than thirty-eight years. Since 1968, he has been employed at Indiana University, Purdue University Indianapolis, and is now professor emeritus of mathematics education. Professor Bittinger has authored over 190 publications on topics ranging from basic mathematics to algebra and trigonometry to applied calculus. He received his BA in Mathematics from Manchester College and his PhD in mathematics education from Purdue University. Special honors include Distinguished Visiting Professor at the United States Air Force Academy, Colorado Springs, Colorado, and his election to the Manchester College Board of Trustees from …

Judith A. "Judy" Beecher has an undergraduate degree in mathematics from Indiana University and a graduate degree in mathematics from Purdue University. She has taught at both the high school and college levels with many years of developmental math and precalculus teaching experience at Indiana University–Purdue University Indianapolis (IUPUI). In addition to her career in textbook publishing, she enjoys traveling, spending time with her grandchildren, and promoting charity projects for a children's camp. Source: [About the Author](https://www.amazon.com/College-Algebra-4th-Judith-Beecher/dp/032169399X)