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When the area is given and you must find a coordinate, use:
ANeither one
BBoth signs
COnly plus
DOnly minus
Answer & Solution
Correct answer: B. Both signs
1. The determinant can be positive or negative.
2. Both give the same magnitude of area.
3. So use both the positive and negative values.
4. The answer is both signs.
_Source: NCERT Class 12 Mathematics, Ch 4 'Determinants'_
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