What is the angle between the two vectors A= 3i^+4j^+5k^ and B= 3i^+4j^-5k^?
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|A| = 5 √2
| B | = 5 √2
dot product = 9+16 - 25 = 0
so the vectors A and B are perpendicular.
| B | = 5 √2
dot product = 9+16 - 25 = 0
so the vectors A and B are perpendicular.
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