Trigonometry is based on the study of right-angled triangles. This is a form of geometry that developed out of the study of the stars. It is also concerned with the relationships that exist between the sides and angles of triangles, and their measurement. Trigonometry comes in two forms, spherical and plane. Spherical is the study of curved triangles lying on the surface of a hypothetical sphere, which is mainly used by astronomers and navigators. Plane …showed first 75 words of 871 total…

…showed last 75 words of 871 total…Mr. Ford Algebra 1 Bibliography Works Cited 1. “Mathematics Made Simple.” Sperling, Abraham, Ph.D., and Stuart, Monroe. Bantam Doubleday Dell Publishing Group: New York, 1991. 2. “High School Review: Math II.” French, Douglas. Random House, INC.: New York, 1998. 3. “Mathematics.” Pascoe, L.C. NTC Publishing Group: Illinois, 1983. 4. “How Math Works.” Vorderman, Carol. The Reader’s Digest Association, Inc.: New York, 1996. 5. “Schaum’s Outlines of Theory and Problems of Trigonometry: Third Edition.” Moyer, Robert E. and Ayres, Frank, Jr. McGraw-Hill, 1999.