If by shifting the origin at (1,1) the coordinates of a point P become `(cos theta, cos phi)` then the original coordinates of P were
A. `(2 cos^(2) theta//2, 2 cos^(2) phi//2)`
B. `(2 sin^(2) theta//2, 2 sin^(2) phi//2)`
C. `(2cos theta//2, 2 cos phi//2)`
D. `(2sin theta//2, 2 sin phi//2)`
