Question

A rain gutter is to be constructed of aluminum sheets 12 inches wide after marking off legs 4 inches from each edge this blank is bent up at in angle theta the area a of the opening may be expressed as the function a theta equals 16 sin theta times cos theta + 1. If theta = 90 degrees, what is the area of the opening

Answer 1

A(90∘)=16sin90∘(cos90∘+1)=16×1×(0+1)=16 i think