+128475 We know the adjacent side to the angle.....and we want to find the hypotenuse [ the side opposite the right angle in the triangle ]
The cosine relates the ratio of the adj side to the hypotenuse
So....we have
cos 60 = 7 / hyp multiply both sides by hyp
hyp * cos 60 = 7 divide both sides by cos 60
hyp = 7/ cos 60 = 14 (ft) = the ladder length
