Mathematics, 17.07.2021 01:50, rosarioemily580

If A = 4i - 5j + 3k, B = 2i - 10j - 7k and C = 5i + 7j - 4k. Show whether B and C are perpendicular.
Show whether A, B and C are coplanar.
Find the projection of A on C.

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If A = 4i - 5j + 3k, B = 2i - 10j - 7k and C = 5i + 7j - 4k. Show whether B and C are perpendicular...