41. Distances to Venus The elongation a of a planet is the angle formed by the planet, earth, and sun (see the figure). It is known that the distance from the sun to Venus is 0.723 AU (see Exercise 71 in Section 5.2). At a certain time the elonga- tion of Venus is found to be 39.4°. Find the possible distances from the earth to Venus at that time in astronomical units (AU). Venus sun Venus 1 AU earth

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