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Suppose bar(a), bar(b), bar(c) be three ...

Suppose `bar(a), bar(b), bar(c)` be three unit vectors such that `|bar(a)-bar(b)|^(2)+|bar(b)-bar(c)|^(2)+|bar(c)-bar(a)|^(2)` is equal to `3` . If `bar(a), bar(b), bar(c)` are equally inclined to each other at an angle:

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