Question

The amount of illumination of a surface is proportional to the intensity of the light
source, inversely proportional to the square of the distance from the light source, and proportional
to sin θ, where θ is the angle at which the light strikes the surface. A rectangular room measures 10
feet by 24 feet, with a 10-foot ceiling (see figure). Determine the height at which the light should
be placed to allow the corners of the floor to receive as much light as possible.

Answer 1

its suppose to be sinx