Artificial intelligent assistant

Apply tangent law on scalene triangle In a triangle,ABC, what is the measure of angle A if the side opposite of angle A is 3 and the adjacent side to angle A is 4? VarsityTutor solved it with tangent formula (opposite/adjacent). But I think it's unsolvable because the triangle is not right or another adjacent side isn't given. What is your opinion about it?

Infinite such triangles are possible .One can not determine angle A . For a unique triangle given data is insufficient

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