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http://img.photobucket.com/albums/v495/lizology101/physicsproblem.jpg?t=1205375687" [Broken]

I know the process to solve the problem but I don't understand what I'm supposed to do with the 16 angle. Aren't the other angles already measured to the horizontal plane of the axis of rotation? If this is the case, there is no need to subtract 16 from the 80 and add 16 to the 60. However, why would they give me 16 then?

Thank you for helping in advance!

I know the process to solve the problem but I don't understand what I'm supposed to do with the 16 angle. Aren't the other angles already measured to the horizontal plane of the axis of rotation? If this is the case, there is no need to subtract 16 from the 80 and add 16 to the 60. However, why would they give me 16 then?

Thank you for helping in advance!

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