Let r be the distance from the origion to a point P with coordinates x and y. Designate the ratio ry by s and the ratio rx by c. Then the values of s^2 \minus{} c^2 are limited to the numbers:
(A)\ \text{less than }{\minus{}1}\text{ are greater than }{\plus{}1}\text{, both excluded}\qquad\\
(B)\ \text{less than }{\minus{}1}\text{ are greater than }{\plus{}1}\text{, both included}\qquad \\
(C)\ \text{between }{\minus{}1}\text{ and }{\plus{}1}\text{, both excluded}\qquad \\
(D)\ \text{between }{\minus{}1}\text{ and }{\plus{}1}\text{, both included}\qquad \\
(E)\ {\minus{}1}\text{ and }{\plus{}1}\text{ only} trigonometryanalytic geometryratiofunction