Use a graphing utility to find own set of polar coordinates

Use a graphing utility to find own set of polar coordinates (r > 0. 0 lessthanorequalto theta

Solution

r = sqrt( (-5/9)^2 + (-2/3)^2 )

= sqrt(25/81 +4/9)

= sqrt(25 +36)/81

= sqrt(61)/9

= 0.868

theta = pi + tan^-1(2/3 /5/9) = 6/5

= pi +tan^-1(6/5)

= pi +0.876

= 4.017 radians

=