Transform to Cartesian coordinate the equations
r = a.

Transform to Cartesian coordinates the equations: r^(2)=a^(2)cos2 theta

Cartesian coordinate of a point

cartesian coordinates of a point

Convert into Cartesian coordinates: (2, 2pi)

Find coordinates of mass center of a quarter ring of radius r placed in the first quadrant of a Cartesian coordinate system, with centre at origin.

Find coordinates of mass center of a quarter sector of a uniform disk of radius r placed in the first quadrant ofa Cartesian coordinate system with centre at origin.

Find coordinates of mass center of a uniform semicircular plate of radius r placed symmetric to the y-axis of a Cartesian coordinate system, with centre at origin.

Transformation of Equation