If Christ was Divine, How Could He Have Been Tempted?
Jesus condescended to become a man, fully a man. Jesus was fully man, while being fully God. This is the Incarnation. Jesus became fully human, with all that being human implies. The relationship between His human nature and divine nature is explained in the doctrine of the hypostatic union - 2 natures, 1 divine person. Jesus' divine nature did not subsume His human nature. His human nature could be tempted. He could suffer human agony, as in the garden of Gethsemane, or on the Cross. Jesus' human nature was tempted in these situations.
http://en.wikipedia.org/wiki/Hypostatic_union
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