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Right triangle ABC with lies in plane with angle C = 90, lies in plane II with BC=3 and AC=4. Segments AR, BS, and CT are drawn perpendicular to, and on the same side of, plane II. If  AR=7, BS=6, and CT=10, compute cos (angle RTS).

 Mar 21, 2021
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cos RTS = 17/25.

 Apr 4, 2021

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