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Q)

The angles $A,B$ and $C$ of a triangle ABC are in arithmetic progression.If $2b^2=3C^2$ determine the angle A

$(a)\;90^{\large\circ}\qquad(b)\;45^{\large\circ}\qquad(c)\;75^{\large\circ}\qquad(d)\;60^{\large\circ}$

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