A 13-foot ladder is used to scale a 9-foot wall. At what angle of elevation (θ) must the ladder be situated in order to reach the top of the wall? Round answer to the nearest degree. Choices: A) 440 B) 460 C) 350 D) 560
Given/Known: r = 13-foot y = 9-foot θ = ??
sin θ = y/r = 9/13
θ = sin-1 (9/13)
θ = 43.813061460
θ = 440 <== Final Answer (A) 440)