Calendar: 1884-1885 Page 642

636 GENERAL LITERATURE AND SCIENCE 13 3x 7Γ-Τ-Γ 2x 11 י δ η χ η ל £ 13 shopkeeper on account of bad book-keeping knows neither the weight nor the prime cost of certain article which he had purchased He only recollects that if he had sold the whole at 305 per lb he would have gaine £5 by it and if he had sold it at 22s per lb he would have lost £15 by it What was the weight and prime cos of the article 10 Reduce to circular measure the following angles 120 700 1' 11 Prove that cos θ sin θ Ka -δ- -71 tan 2Θ sec 26 cos θ sin θ cos2 θ φ sin2 θ cos φ cos φ 12 person on the top of tower the height of which is 50 feet observes the angles of depression of two objects on the horizontal plane which are in the same straight line with the tower to be 30 and 45 respectively Find their distances from each other and from the observer II uclft What positive property has Geometrical point Give Euclid's definition of plane rectilineal angle What are the limits of the angles considered in the First Book Show how to describe an equilateral triangle upon given finite straight line