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Components of a vector and unit vectors: Find the displacement from cave entrance

While exploring a cave a woman starts at the entrance and moves the following distances. She goes 75.0m north,250m east, 125m @an angle of 30 degrees north of east and 150m south. Find the resultant displacement from the cave entrance.

Solution Preview

Let east as +ve x direction, and north as +ve y direction
displacement i x = 250 + 125*cos(30)
=> x = 250 + ...

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