No referencial está representado o círculo trigonométrico e um ponto A, resultante da intersecção da circunferência como lado extremidade de um ângulo de amplitude 150º.As coordenadas do ponto A são: * Imagem sem legendas

The first one, i believe, would be correct. all the others have one thing in common, and that's that they have repeating numbers. in the second one, x and y have repeating 6's and 3's, and in the third, x and y have repeating 6's as well. in the last one, there are repeating 3's. the first one has no repeating numbers.