Let A≡(−2,2) and B≡(2, −2) be two points and AB subtends an angle of 450 at any point P in the plane in such a way that area of ΔAPB is 8 square unit, then number of possible position (s) of P is
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a
1
b
2
c
4
d
infinity
answer is C.
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Detailed Solution
∵ AB=4 and area of ΔAPB=8 ∴ 12×4×h=8 ⇒ h=4, h, the height of ΔAPB The figure it is clear that P lies on circle of radius 22 unit with AB as its chordso there are four possible position of P.
Let A≡(−2,2) and B≡(2, −2) be two points and AB subtends an angle of 450 at any point P in the plane in such a way that area of ΔAPB is 8 square unit, then number of possible position (s) of P is