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Vectors A and B have scalar product -4.00 and their vector product has magnitude 9.00. Here's what I did: ABcos=-4 ABsin=9 sin/cos=-2.25 tan=-2.25 angle=-66? I entered this and it says it's incorrect. What did I do wrong?

A 2.49e4 kg rocket blasts off vertically from the Earth's surface with a constant acceleration. During the motion considered in the problem, assume that g remains constant. Inside the rocket, a 12.4 N instrument hangs from a wire that can support a maximum tension of 36.0 N. a) Find the minimum...