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Questions  

One  vertex of an  equilateral triangle of side a lies at the origin and the other lies on the line x=3y then the third vertex is

a
(0, a)
b
(0,−a)
c
(−a, 0)
d
(a, 0)

detailed solution

Correct option is B

y=13xm=tanθ=13θ=300And third vertex lies as y-axis i.e., (0, a)

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