Question

an observer stands on the bank of a river, and looks directly across the river to a tree on the opposite bank. the angle of elevation from the feet of the observer to the top of the tree is 35 degrees. if the tree is 22 feet tall, how wide is the river?

Answer 1

tan θ = opposite / adjacent

adjacent = opposite / tan θ

adjacent (river width) = 22 / tan 35

width = 22 / .70 = 31 ft