Hello all, I have a question concerning the Tangent and Secant Functions (the graphs). I cannot think of a way that either of these can be used in the real world. I need to find applications for these. For example, the sine function can be used to represent waves or periodic motion... but what can secant and tangent represent? I have been thinking about this for a very long time and I cannot seem to find an answer. The difficult thing about the Tangent function is that it has a vertical asymptote? What things in today's world could use asymptotes, and then repeat? The Secant, that is just weird looking and seems in no way possible to fit a model of data? Please help me, I cannot figure it out. Thank you.