数学,船A yacht sails 17 km on a bearing 104° followed by 14 km on a bearing 324°. Calculate the distance (in km to the nearest 0.1 km) and bearing (to the nearest degree) of the yacht's final position from its initial position.2.1 distance2.2 be

来源:学生作业帮助网 编辑:六六作业网 时间:2024/11/25 09:02:31
数学,船Ayachtsails17kmonabearing104°followedby14kmonabearing324°.Calculatethedistance(inkmtothenearest0

数学,船A yacht sails 17 km on a bearing 104° followed by 14 km on a bearing 324°. Calculate the distance (in km to the nearest 0.1 km) and bearing (to the nearest degree) of the yacht's final position from its initial position.2.1 distance2.2 be
数学,船
A yacht sails 17 km on a bearing 104° followed by 14 km on a bearing 324°.
Calculate the distance (in km to the nearest 0.1 km) and bearing (to the nearest degree) of the yacht's final position from its initial position.
2.1 distance
2.2 bearing (°) ≈

数学,船A yacht sails 17 km on a bearing 104° followed by 14 km on a bearing 324°. Calculate the distance (in km to the nearest 0.1 km) and bearing (to the nearest degree) of the yacht's final position from its initial position.2.1 distance2.2 be
第一问:设出发点为O,终点为B,中间点为A
那么依据题意有角OAB为40°,OA=17km,OB=14km,根据余弦定理,cosA=cos40°=(OA²+AB²-OA*AB)/2*OA*AB可以求得AB=根号下(485-476*cos40°)≈11.0km
第二问:在一问的基础上,同样根据余弦定理,可以知道cosAOB=(17*17+11*11-14*14)/2*17*11≈0.5722,查下0.5722对应的余弦值表,可以算的角AOB的度数,那么度数就是104°-角AOB

no t or v?

  一艘游艇航行,从17公里在104°方向 , 到14公里在324方向°。  (从A到B)
  计算距离(公里到最近的0.1公里)和方向(最近的程度)的游艇的最终位置从其原始位置。
  
  2.1距离AB
  2.2AB的方向(°)

 

distance 约为10.97
bearing 约为84.89度
我算的时候104和324都是基于同一初始点算的,按照题中的关系,可以描绘出一个从初始点O开始到A点边长为14的边,以及从A点到B点边长为17的边,之后连接AB。角A的度数可以用104+360-324 = 40 度推出 角O加角B为140,之后就是正弦定理了。。。可以利用这个计算,就是三角函数的计算是个问题。。。我是...

全部展开

distance 约为10.97
bearing 约为84.89度
我算的时候104和324都是基于同一初始点算的,按照题中的关系,可以描绘出一个从初始点O开始到A点边长为14的边,以及从A点到B点边长为17的边,之后连接AB。角A的度数可以用104+360-324 = 40 度推出 角O加角B为140,之后就是正弦定理了。。。可以利用这个计算,就是三角函数的计算是个问题。。。我是凑的(掩面。。。)总之结果应该就是这样了

收起

数学,船A yacht sails 17 km on a bearing 104° followed by 14 km on a bearing 324°. Calculate the distance (in km to the nearest 0.1 km) and bearing (to the nearest degree) of the yacht's final position from its initial position.2.1 distance2.2 be “yacht”是什么意思? yacht怎么读 yacht怎么读 Being humiliated by a new commer has taken the wind out of this sails.翻译 displacement yacht,和performance yacht是什么意思,发动机是专门for displacement yacht设计的. Can you imagine a boy of 14 sail across the Pacific alone?这句话除了改sailing.可否改sails I can hardly imagine Peter ___across the Atlantic Ocean in five days A.to sail B.sailing C.sails Harbour Cruise的中文名称Board a magnificent restaurant boat which sails along the Victoria Harbour in HongKong. It marked the end of the great tradition of ships with sails and the beginning of a new era.the end of the great tradition of ships 这个是什么with sails 是状吗 Your love is my sails the city of sails是什么意思 有一个英语单词不会.yacht啥意思? yacht中为什么ch不发音? yacht中为什么ch不发音 请帮忙翻译一句英文It marked the end of the great tradition of ships with sails and the beginning of a new era 选择题20. He works on aship ___ from China to Japan.A. sailed B. that sailing C. sailing D. sails选哪个 为什么 英语翻译There are many ways to explore the reef - from a dive boat,a yacht,a coral viewing boat complete with glass bottom,a sea kayak,snorkelling or from the air.