Art-Engineer Sara hangs up a nice painting with the height "h" on a wall so that the board's bottom edge is placed distance "d" above Sara's eye level. On what distance from the wall, can Sara stand for her to see the whole picture at best? You can assume that Sara has very good eyesight.

Question

anonymous · Answer

@Michele_Laino

michele_laino · Answer

what is the condition to see at best?

michele_laino · Answer

do you have any idea, about that?

anonymous · Answer

@Michele_Laino, no, This is a math problem and we are in the chapter about derivate, so its probably something that you should derivate theta considering x

michele_laino · Answer

please, correct me if I'm wrong, the situation is like below:
|dw:1447868229280:dw|

anonymous · Answer

@Michele_Laino yes!

michele_laino · Answer

sincerely,  I don't know what function I have to consider

michele_laino · Answer

@TheSmartOne  please help!

thesmartone · Answer

Sorry, I'm not sure either. @Directrix @robtobey please help! Thanks :)