Police agent flying a constant 200 km/h horizontally in a low flying wish to drop an explosive onto a master criminal's automobile travelling 130 km/h on a level highway 78 m below. at what angle (with the horizontal) should the car be in their sights when the bomb is released



By using the formula:
 [ TAN(-1)angle = -9.80 t / horizontal velocity ]

     ........ i get -75 degrees. Answer in book is -61.8 degrees