A and B are two sets such that
$A=\{(x,y):\frac{x}{\cos \theta }=\frac{y}{\sin \theta }=r,\text{\hspace{0.17em}\hspace{0.17em}r\hspace{0.17em}\hspace{0.17em}is\hspace{0.17em}\hspace{0.17em}fixed \hspace{0.17em}positive real number and }\theta \text{\hspace{0.17em}is real\hspace{0.17em}}\}$ 
 $B=\{(x,y):\frac{x}{\cos \theta }=\frac{y}{\sin \theta }=r,r\in R^{+}and\theta isfixed\}$
Let $C_1$ and $C_2$  be the curves represented by A and B respectively then