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A man is standing 35 m from a building. On top of the building is a flg. From the man, the angle of elevation of the top of the building is pi/6 radians and the angle of elevation of the top of the flag is pi/3 radians. Determine an exact expression for the distance from the top of the flag to the top of the building.

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Did you make a diagram?

I see it as
height of flag above building
= 35tan60º - 35tan30º

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