 Manipulative 1: Secant Created with GeoGebra. 

Secant is defined to be equal to the length of the
hypotenuse divided by the length of the side adjacent to the angle. This is
also equal to the
multiplicative inverse
of the
cosine
function.
In manipulative 1, click on the blue points and drag them to change the figure.

 Figure 1: Secant equations. 
