1.

If points `O(0,0) A(3,sqrt(3)) and B(3,a)` are the vertices of an equilaterla triangle then a=A. 2B. `-3`C. `-4`D. none of these

Answer» Correct Answer - D
It id given that `DeltaOAB` is equilateral.
`:. OA=OBrArr 9+3=9+a^(2)rArr a=+-sqrt(3)`


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