1试题呈现如图1,港口B位于港口A的南偏东37°方向,灯塔C恰好在AB的中点处.一艘海轮位于港口A的正南方向,港口B的正西方向的D处,它沿正北方向航行5 km到达E处,测得灯塔C在北偏东45°方向上.这时,E处距离港口A有多远?(参考数据:sin 37°≈0.60,cos 37°≈0.80,tan 37°≈0.75) 1 The test question is presented in Figure 1. Port B is located 37 ° south east of Port A. Lighthouse C is just at the midpoint of AB.A seagoing vessel is located in the positive south of port A and in the positive west of port B at point D , It sailed 5 km in the north direction to reach E, and measured the direction of the beacon C 45 ° to the east 45 ° east. At this point, how far away from port A is from E? (Reference data: sin 37 ° ≈0.60, cos 37 ° ≈0.80, tan 37 ° ≈0.75)