Number 11.39. Please help me

time interval t= 0 and r 5 s. 11.39. A projectile is fired due east from a point on the surface of Earth at a north latitude of A, with a ve- locity u and at angle of inclination a with the horizontal. Show that the lateral deflection when the projectike hits the ground is (neglect terms of w) Ar w sin 2a sin a sin A %3D 11 of the pmictilc is R for the case w = 0, show that the change in the