Basic PDEs Which of the following statements is guaranteed to be true? a O [y + 2x² cos(y)] = 1- 2x² sin(y) dx O [y+ 2x² cos(y)] = 1 – 2x² sin(y) ○y + 2x² cos(y)] = 1 — 2x² sin(y) O y + 2x² cos(y)] = 1 − 2x² sin(y)

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