A cute puppy walks 20 m at 30 degrees north of east and then continues another 45 m at 15 degrees south of east. Find the magnitude of the puppy's net displacement (or the distance from the starting point)

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  1. break each up into N, E components, then add.

    20sin30N + 20cos30E -45sin15N+45cos15E=R

    now combine the N, E vectors
    xxxxN + yyyyE= R
    magnitude of R=sqrt(xxxx^2 + yyyy^2)

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