# I think the ans shud be 12 but the ans given is 6. cant cosangle be -1 ? then the ans will be 12. see attached q.

1
by namku

answer is wrong, consider the unit vectors : <-1/sqrt(2), 1/sqrt(2)>, <-1, 0> and <1, 0>

they give you |a-b|^2 + |b-c|^2 | + |c-a|^2 = 9

oh ya sorry ans is 8

answer has to be 9

ya ya typing error sorry it is 9.

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