question_answer

A ladder rests against a wall at an angle \[\theta \] to the horizontal. Its foot is away from the wall through a distance ?m?, so that it slides a distance 'n' down the wall making an angle\[\phi \]with the horizontal then \[\frac{\mathbf{n}}{\mathbf{m}}\] is equal to _________

A)  \[\frac{\cos \theta -\cos \phi }{\sin \phi -\sin \theta }\]                                            

B)  \[\frac{\sin \phi -\sin \theta }{\cos \theta -\cos \phi }\]

C)  \[\frac{\cos \theta +\cos \phi }{\sin \phi +\sin \theta }\]                                                    

D) \[\frac{\sin \phi +\sin \theta }{\cos \theta +\cos \phi }\]

E) None of these