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JEE Math Practice Question

If the line segment joining the points $$(5,2)$$ and $$(2, a)$$ subtends an angle $$\frac{\pi}{4}$$ at the origin, then the absolute value of the product of all possible values of $a$ is :

  1. A.4
  2. B.8
  3. C.6
  4. D.2

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