ABSTRACT
The purpose of this chapter is to introduce the parabolic periodic- and hyperbolic-type trigonometric functions. A search of the literature indicates that little significant work has been done on such functions. In fact, much of what will be presented is new. The critical formula for our initial investigations is () | y | + ( 1 2 ) x 2 = 1 2 . https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9780429446238/d61a7316-5f65-4e0a-956e-ef5c7afc82a1/content/eq373.tif"/>
