Learning How to Use the Prime G2 - Hallway Pole Problem - In Three Parts

[teerasak]

Starting from 5/sin(x) + 10/cos(x) = ct. Then I solved the value of x where the derivative of ct to x is 0. I found x = -2.47, and 0.67, so only the positive value is applicable. Then put x=0.67 in ct, then we have ct = 20.81.