Boyboy and Elang are on a hike. Starting from home base, they make the following movements: (A) 2.65 km, 140 N of E; (B) 4.77 km, 252 N of E; (C) 3.18 km, 332 N of E.
Their displacement toward the North is, respectively:
(a) "2.65\u00b7\\sin140\u00b0=1.7\\text{ km}."
(b) "4.77\u00b7\\sin252\u00b0=-4.54\\text{ km} \\\\\\text{(or 4.54 km toward South)}."
(c) "3.18\u00b7\\sin332\u00b0=-1.49\\text{ km}."
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