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Two points (5, 2) and (2, a). Line passes through these points makes an angle of π/4

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Two points (5, 2) and (2, a). Line passes through these points makes an angle of π/4 at origin. The product of all values of a is equal to 

(1) 8 

(2) -4 

(3) -2 

(4) 1

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1 Answer

+1 vote
by (38.5k points)

Correct option is (2) -4 

Line passes through these points makes an angle of

Line passes through these points makes an angle of

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