Equilibrium: The figure shows a block of mass M hanging at rest. The light wire fastened to the wall is horizontal and has a tension of 38 N. The wire fastened to the ceiling is also very light, has a tension of 59 N, and makes an angle ? with the ceiling. Find the angle ?. 
A. 50°
B. 40°
C. 33°
D. 65°
E. 45°
Answer: A
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