These are notes for a course in precalculus, as it is taught at New York CityCollege of Technology — CUNY (where it is offered under the course numberMAT 1375). Our approach is calculator based. For this, we will use thecurrently standard TI-84 calculator, and in particular, many of the exampleswill be explained and solved with it. However, we want to point out thatthere are also many other c…