NCERT Example 12 - Vector Algebra
Question: Show that A(2 i-hat - j-hat + k-hat), B(i-hat - 3 j-hat - 5 k-hat), C(3 i-hat - 4 j-hat - 4 k-hat) are vertices of a right-angled triangle.
Answer: Shown as required (right-angled at C).
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