1- The letters r and 0 represent polar coordinates. Write the following equation using rectangular coordinates (x,y)

r=cos0

a) (x+y)^2=x b) (x+y)^2=y c) x^2+y^2=y d) x^2+y^2=x

2- The letters x and y represent rectangular coordinates. Write the following equation using polar coordinates (r,0)

y=x

a) r=sin0 b) r=cos0 c) sin0=cos0 d) sin0= -cos0

3- The letters r and 0 represents polar coordinates. Write the following equation using rectangular coordinates (x,y)

r= 5/1+cos0

a) x^2=25-10y b) x^2=10y-25 c) y^2=10x-25 d) y^2=25-10x

4- The letters x and y represent rectangular coordinates. Write the following equation using polar coordinates (r,0)

x=-3

a) rcos0=-3 b) rcos0=3 c) rsin0=-3 d) rsin0=3