On the TI-84 graphing calculator, using the draw inverse feature, we can graph inverses which are not functions. See the inverse of cos(x) it is not a function cause y = cos(x) is not one to one. Using y = cos^-1(x) we do get a function because the domain of cos(x) is restricted So 2 regents questions not written well. How can questions be field tested and have 2 correct multiple choice answers? Why is the scoring rubric "password protected I don't know if it was accepted to use sin(1/2)(150) for sin 75 along with sin(30 + 45) Vern Tenney
