Two particles are projected simultaneously in the same vertical plane, from the with speed `u_(1)` and `u_(2)` at angle of projection `theta_(1)` and `theta_(2)` respectively with the horizontal. The path followed by one, as seen by other (as long as both are in flight), is

Options

A. an inclined straight line
B. a vertical straight line if `u_(1) cos theta_(1) = u_cos theta_(2)`
C. both (1), (2)
D. none

Answer

C