a ladder learning against a wall makes an angle of 60 ° with the ground . if the length of the ladder is 19 m , find the distance of the foot of the ladder from the wall .
let ab be the wall and bc be the ladder . then , < abc = 60 ° and , bc = 19 m . ; ac = x metres ac / bc = cos 60 ° = x / 19 = 1 / 2 x = 19 / 2 = 9.5 m . answer b
multiply(cosine(divide(multiply(60, divide(add(19, const_3), add(const_4, const_3))), multiply(const_60, const_3))), 19)