Starting from one oasis, Thaïs and Athanaël walk 25 km in a direction 30° south of west and then walk 30 km toward the north to a second oasis. What is the direction from the first oasis to the second oasis?

= 51° West of North

Explanation:

The displacement along the horizontal direction

The displacement along the vertical direction

The magnitude of the displacement is

The direction is

= 51° West of North

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