The rain gutter is to be made of aluminum sheets 12 inches wide. After marking off the length of four inches, from each edge, this length is bent up at angle theta. Cross-section area A of opening as the function of θ is provide by A(θ)=16sinθ(cosθ + 1), where θ is between 0 degrees and 90.
solve the equation algebraically.
Find max cross section area of opening?