IMAGE EVALUATION TEST TARGET (MT-3) V. /, {'/ ^y ^ y. W M i4 lo #< 6 1.0 I.I 1.25 1^ M 2.2 |3.2 t 1^ 111112.0 1.8 \A. IIIIII.6 V] <^ /a '^A ^/. %. Photographic Sciences Corporation 33 WEST MAIN STREET WEBSTER, N.Y. 14580 (716) 872-4^03 iV qv % V <^ o ]. Cos e ± Cos tj . Sine e and from this prove that in trigonometrical language r Sine i; = 2 Sine | rj . Cos i rj ; show also how this is used in finding the rule or for- mula for the area of a triangle in terms of the sides. 10. Solve the equation 2a? -{ Ja? i 3 — 5x=\ — 2a?. 'a/i(fU^ iJl Evening. — Surveying & Engineering. 1. Point out the optical and mathematical prin- ples and the mechanical contrivances by which the Sextant is suited to measure angles ; and prove that it can indicate correctly the magnitude of anv angle less than 120°. 2. What is the height of a tower, the angle of whose elevation is 45° at a distance of 1 .3 chains ? 3. How many square miles are in the area of a triangular Estate, whose sides are 30 miles, 60 miles, and 36 miles respectively. 4. How does the water act in Irrigation, and state the princfptewules for irrigation, as well as the most suitable soils for water meadows ? 5. Write down detailed instructions for Draining a 50 acre Field, including size of main drain, &c., the fall of which may be made 8 feet in a mile. 6. What difference would you be called on to make in order to secure the same results, if the fall was only 4 feet per mile ? 7. How rr^ich cutting would you require in order to remove a hill 1 mile long on an ordinary road, whose slope in either direction you find 400 feet in a mile, so as to leave it 1 in 20. 8. Describe all the instruments employed and the processes gone through in the collection of the follow- ing notes ; reduce them and plot the section by writing figures for height and distances, (or to a scale of 3 chains to an inch horizontal and 20 feet to an inch vertical;) also, write down the elevation of one end of the section above the other ; \ Back Staff, feet. 3.56 Fore Staff, feet. 2.25 4.26 5.38 6.83 5.32 3.66 17.44 Distance in links. 300 On B. M. R.A.C. Avenue 500 gate-post. 700 1000 Farm Buildings ^^A^^^^