AS/A2 Pure 4 Pure 6

P5 Topic 2: Hyperbolic functions
Graphs and properties: sech ax
Change the value of a and describe the geometric symmetry of the curve.

Summary sech ax is an example of an even function, ie., f(-x) = f(x) The curve has reflection symmetry about the y-axis. sech ax £ 1 for all values of a or x Based on free Java applets from JavaMath