Reciprocal trig ratios traced from sine, cosine and tangent graphs[br][br]Clear the trace after each graph is drawn

What is special about the point where sine and cosecant intersect? Is this the same for the other graphs?[br][br]What happens to the sine, cosine and tangent graphs where cosecant, secant and cotangent are undefined (very large +ve or -ve values)?[br][br]What happens to tangent graph when cotangent is zero?