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What is the tension?

A 108 N lamp is hung up with two ropes that each make 20º angles with the horizontal. What's the tension in the ropes? What's the tension if the angle is 60º?

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Robert J. | Certified High School AP Calculus and Physics TeacherCertified High School AP Calculus and Ph...
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I answered the problem a while ago. Here is the copy of my answer:
 
 
With symmetry, apply Newton's second law in vertical direction:
2Tsinθ = mg
 
T = 108/(2sinθ)
 
θ = 20o, T = 158 N
 
θ = 60o, T = 62.4 N