Respuesta :
Taking K as the right angle =>
cos (L) = segment LK / hypotenuse
=> cos(L) = segment LK / √ [ (segment LK)^2 + (segment KJ)^2 ]
cos (L) = segment LK / hypotenuse
=> cos(L) = segment LK / √ [ (segment LK)^2 + (segment KJ)^2 ]