Question

A laser light, placed 16m from the base of the wall, shines a point on the wall that is 7m up from the ground. At what angle of elevation should the light be set?

Answer 1

tanα=opposite/adjacent

tanα=height/distance

tanα=7/16

α=arctan(7/16)°

α≈23.63°  (to nearest hundredth of a degree)