A particle is projected with an angle of projection `theta` to the horizontal line passing through the points (P,Q) and (Q,P) referred to horizontal and vertical axes (can be treated as X-axis and Y-axis respectively). The angle of projection can be given by

Options

A. `tan^-1[(P^2+PQ+Q^2)/(PQ)]`
B. `tan^-1[(P^2+Q^2-PQ)/(2PQ)]`
C. `tan^-1[(P^2+Q^2)/(2PQ)]`
D. `sin^-1[(P^2+Q^2+PQ)/(2PQ)]`