A small sphere with a mass of 3.00103g and carrying a charge of 4.80108 C hangs from a thread near a very large, charged insulating sheet, as shown...

A small sphere with a mass of 3.00×10−3g and carrying a charge of 4.80×10−8 C hangs from a thread near a very large, charged insulating sheet, as shown in the figure . The charge density on the sheet is −2.50×10−9 C/m^2 . Find the angle of the thread.