(20 14? As shown in the figure, the radar observation station A located on an island in the East China Sea is found to be 45 northeast, and at B it is 202 nautical miles away from the observation stat

(20 14? As shown in the figure, the radar observation station A located on an island in the East China Sea is found to be 45 northeast, and at B it is 202 nautical miles away from the observation station A. ∵cosθ=45,∴sin=35，

From the meaning of the question ∠ BAC = 45-θ, that is, cos ∠ BAC = cos (45-θ) = 22 (45+35) = 7210,

AB = 202，AC= 10，

∴ BC2=AB2+AC2-2AB from cosine theorem? ACcos∠BAC，

That is bc2 = (202) 2+102-2× 202×10× 7210 = 800+100-560 = 340,

That is, BC = 340 = 2 has praise and tread. What is your evaluation of this answer? Comments: If your problem has not been solved, please describe your problem in detail and conduct free professional consultation through Baidu Legal Pro. Other similar questions 20 15-02-06(20 14? Weifang) as shown in the figure, there are two islands A and B in a certain sea area, with an altitude of 200m, and the vertical height of a certain measuring plane from the sea level is1100m112201-07-29 as shown in the figure. Now it is located at 44620 14- 10-23, as shown in the figure. The radar observation station located at A found that it was 45, and a cargo ship was driving in a straight line at a constant speed at B, which was 202 nautical miles away from A, for 20 minutes, 320 12-07-0 1, as shown in the figure. A. B is two observation points on the sea surface with the east-west distance of 10(3+ 3) nautical miles. Now, B is the two observation points on the sea surface with a distance of 5(3+√3) nautical miles from east to west. Now they are located 60° B northeast of point A, and there is an island 45 northwest of point D. In order to measure the distance between the two ends of Island A and Island B, surveyors designed a measuring method. It is known that point B is the midpoint of CD 120 16-02-27. As shown in the figure, the radar observation station A located on an island in the East China Sea found a cargo ship traveling at a constant speed in a straight line at point B on the sea surface starting from observation station A. I recommend it for you: F.context('cmsRight', [{'URL':'/d 01373f082025aaf51kloc-0/aa225. x-BCE-process = image % 2f resize % 2Cm _ lfit % 2Cw _ 450% 2Ch _ 600% 2c limit _ 1% 2f quality % 2Cq _ 85% 2f format % 2Cf _ auto '， ' contractId':'A24KA00562 '，}，{ ' URL ':/builder/bjh-activity/articlesTask？ taskId = 1598082 & aside = 0 & footer = true & from = 0 '，' src ':'/203 FB 80 e 7 bec 54 e 773 ea 0680 ab 389 b 504 fc 26 a2d？ x-BCE-process = image % 2f resize % 2Cm _ lfit % 2Cw _ 450% 2Ch _ 600% 2c limit _ 1% 2f quality % 2Cq _ 85% 2f format % 2Cf _ auto '，' contractId ':' '，}，{ ' URL ':/s？ word = % E6 % AC % A7 % E6 % B4 % B2 % E6 % 9D % AF & sa = searchpromo _ ozb _ zhidao _ tuijian '，' src ':'/3 BF 33 a 87 e 950352 AAF 5 df 4954 143 fbf2b 2 1 18 b6b？ x-BCE-process = image % 2f resize % 2Cm _ lfit % 2Cw _ 450% 2Ch _ 600% 2c limit _ 1% 2f quality % 2Cq _ 85% 2f format % 2Cf _ auto '，' contractId ':' '，}])； Why is the cost of cancer treatment getting higher and higher? The price of electric cars has dropped many times. Is the quality guaranteed? What impact will the "network toilet" have? Is Huaqiang North's second-hand mobile phone reliable? I recommend f.context ('recbrand', [{"img": "\/86D6277F9E2F07083523F69DFB 24B 899A901F20d? x-BCE-process = image % 2f resize % 2Cm _ lfit % 2Cw _ 450% 2Ch _ 600% 2c limit _ 1% 2f quality % 2Cq _ 85% 2f format % 2Cf _ auto "，" url":"/hm.js？ 6859 ce 5a af 00 FB 00387 e 6434 E4 FCC 925 "； var s = document . getelementsbytagname(" script ")[0]； s.parentNode.insertBefore(hm，s)； })(); window . TT = 17207366 15；