\"\"

\

The polar equation is \"\".

\

\"\"                                     (Multiply each side by r.r)

\

\"\"

\

\"\"                                     (Double angle identity: \"\")

\

\"\"

\

\"\"                                      (Substitute : \"\")

\

\"\"            (Substitute : \"\")

\

\"\"

\

\"\"

\

\"\"

\

The rectangular form is \"\".\"\"

\

The rectangular form is \"\".