Parametric - Eliminating the perameter

[razored]

In both exercise, eliminate the parameter.

Problem 1 :
http://mathbin.net/equations/8157_0.png
When I graph this, it is a circle. THAT does not appear like a circular equation.Problem 2 :
http://mathbin.net/equations/8159_0.png
I am afraid of the absolute value signs. How do I deal with this situation?

If you cannot see them, go here : http://mathbin.net/8157 and http://mathbin.net/8159

 

[lanedance]

i can't see anything