Retired 12/31/2008: This course will focus on definitions, properties, and graphical characteristics of trigonometric functions, radian measure, trigonometric identities and equations, solution of oblique and right triangles, inverse trigonometric functions, and powers and roots of complex numbers. Further topics may include polar coordinates and vectors. Prerequisite: For a two-credit hour course, college algebra is required. For a three-credit hour course, high school algebra and geometry (or equivalent) are required.