Since th th can be any angle the resulting cardioid can orient horizontally or vertically. In fact outside of this range of x-values there are no real y-values. Sqrt cos xcos 400xsqrt abs x-04 4-xx01.
If we take a lot of points and join them we get the following graph.
Ask them to search it on Google and I am pretty sure they will be amazed to see a beautiful heart graph drawn on the top of their search results. Because I have an L here and we know that L is equal to H plus four so if I substitute H plus four in for L then I have one equation with one unknown if L. Then press the 2 nd key and y followed by enter twice to turn on Plot1. If we take a lot of points and join them we get the following graph.