Question

in a tangent equation how do you find a second pair of points? How do you find out what Q is?

Answer 1

when given any equation, you find the an ordered pair solution by plugging in an arbitrary value into the "input" variable that is within its domain; and see what the "output" variable gives you. Then pair them up in the usual manner: (in,out) and find a suitable cross product application to plot them in.