Question

if a ladder 15 meters long is placed so as to reach the bottom of a window 10 meters high, what distance on the ground does the ladder adjusted if it is placed on the top of a two meter square window and what is the new angle of elevation of the top of the window with respect on the ground?
X = ?
Y = 10+2 = 12 m.
L = 15 m.

Sin A = Y/L = 12/15 = 0.80, A = 53.1o

X = L*Cos A = 15*Cos53.1 = 9 m.

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