How do you convert #(11,-9)# into polar coordinates?

Related questions

• What is the formula for converting polar coordinates to rectangular coordinates?
• How do I convert polar coordinates #(5, 30^circ)# to rectangular coordinates?
• How do I convert polar coordinates #(3.6, 56.31)# to rectangular coordinates?
• How do I convert polar coordinates #(10, -pi/4)# to rectangular coordinates?
• How do I convert polar coordinates #(4,-pi/3)# to rectangular coordinates?
• How do I convert polar coordinates #(6, 60^circ)# to rectangular coordinates?
• How do I convert polar coordinates #(-4, 230^circ)# to rectangular coordinates?
• What is the Cartesian equivalent of polar coordinates #(sqrt97, 66^circ)#?
• What is the Cartesian equivalent of polar coordinates #(2, pi/6)#?
• What is the Cartesian equivalent of polar coordinates #(7, pi)#?