If x2 + y2 + sin y = 4, then the value of ${{{d^2}y} \over {d{x^2}}}$ at the point ($-$2,0) is :

Question

If x² + y² + sin y = 4, then the value of ${{{d^2}y} \over {d{x^2}}}$ at the point ($-$2,0) is :

$-$ 34