Texas Instruments TI83 Graphing Calculator for $74.98

Perhaps if we'd had this calculator in high school we would have done much better in trigonometry. The Texas Instruments TI-83 is an ideal unit for any math student, combining powerful features for graphing and statistical analysis.The LCD screen displays 16 characters over 8 lines. Though the TI-83's keyboard layout might seem daunting to those who've never laid eyes on a graphic calculator before, the helpful, if intimidatingly thick, manual will get you up and running quickly.The TI-83 includes function, parametric and polar, and sequence plot modes. You can store, graph, and analyze up to 10 functions, 6 parametric and polar functions, and 3 sequence functions. The TI-83's Draw operations allow you to annotate graphs.