Maths Class 10
Chapter- 9, Some Applications of Trigonometry
Exercise- 9.1, Q.No.-16
The angle of elevation of the top of a tower from two point at a distance of 4m and 9m from the base of the tower and in the same straight line with it are complementary. prove that the height of tower is 6m.
Maths Class 10
Chapter- 9, Some Applications of Trigonometry
Exercise- 9.1, Extra Question
Rd Sharma question from some Applications of Trigonometry
A ladder rests against a vertical wall at an inclination alpha to the horizontal . Its foot is pulled away from the wall through a distance a, so that its upper end slides a distance b down the wall and then the ladder makes an angle beta to the horizontal . show that a / b=(cos beta-cos alpha) / (sin alpha - Sin beta).
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