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The vectors from origin to the points A and B are a⃗=2i^−3j^+2k^\vec{a}=2\hat{i}-3\hat{j}+2\hat{k} and b⃗=2i^+3j^+k^\vec{b}=2\hat{i}+3\hat{j}+\hat{k} respectively, then the area (in Sq. unit) of triangle OAB is:

Solution

✅ Correct Option: 4

a⃗×b⃗=−9i^+2j^+12k^\vec a\times\vec b=-9\hat i+2\hat j+12\hat k, whose magnitude is 81+4+144=229\sqrt{81+4+144}=\sqrt{229}. Area of triangle OAB =12229=\frac12\sqrt{229}.

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