A、B、C 是水平地面上的三个点。
从 B 观测 A 的方位角是 040°。

它不会直接告诉你答案，而是问你卡在哪一步看看 AI 是怎么陪你一步步弄懂这道题的

完整解法

1. Find the reverse bearing by adding $180^\circ$.

Bearing of A from B $= 040^\circ$ .

So bearing of B from A
$= 040^\circ + 180^\circ = 220^\circ.$

答案

$220^\circ$

1. Use the bearing of B from A from part (a).

From part (a), the bearing of B from A is
$220^\circ.$

2. Use the angle at A to find the bearing of C from A.

At A, the angle between $AB$ and $AC$ is $65^\circ$ .

From the diagram, $AC$ is to the left of the direction $AB$ when measured as a bearing, so
$\text{bearing of C from A}=220^\circ-65^\circ=155^\circ.$

答案

$155^\circ$

AI 分析，可能出错

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