There are many types of derivatives used in real life engineering  situations but, the one I am going to talk about is tangents used in  daily life

There are many types of derivatives used in real life engineering  situations but, the one I am going to talk about is tangents used in  daily life. I specifically want to explain an example of a secant  tangent line used in daily life for engineers. A secant line is a line  that connects to two points on a circle. Astronauts use this to find  things like the distance from the moon while it is orbiting to many  different locations on earth. The formula used for this real life  equation is y-b=[(d-b)/(c-a)](x-a). For example, if you are using this  equation and are given the values (5-3)/(-2-1). Your equation of the  secant line should look like so y-3=-2/3(x-1) then y=(-2/3)x+2/3+3 with  the solution being y=(-2/3)x+11/3.