a ladder turning against a wall make an angle of 60° with horizontal if the foot of ladder is 2.5 away from wall find length of ladder
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cos 60 = B/H.
.1/2 = 2.5/ H
1/2 * 2/5 =H
1/5 = H
.1/2 = 2.5/ H
1/2 * 2/5 =H
1/5 = H
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