New plane and spherical trigonometry, surveying, and navigation (1903)
Wentworth, G. A. (George Albert), 1835-1906 · Boston : Ginn & Company · leaf 139
ther S.S.W. Find the ships rate. In the figure for the solution ofExample 28, let B and B be thelighthouses, C the original positionof the ship, and A its final position.Then CM£=22°30and CAR=46°;hence ABC = 67° 30 and B = 45°. a n _ q sin 45° sin 67° 80/A O — o sin 22° 30= 8 sin 45° cot 22° 30.log… … Let CBB be the inclined plane,AC the object, B and B two pointsof observation, AC the perpendic- ular from A on CBB. Then givenCB, BB, and the angles ABC, B;required AC. From the solution of Example 28,„ sin B sin ABC AC = BB and CB = BB sin (ABC - B)sin jB cos ABC and sin (ABC - B)Then CC = CB -…
Trigonometry · Surveying · Navigation
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