(30)^2+(33)^2-2(30)(33)(cos(115))
d^2 = (30)^2+(33)^2-2(30)(33)(cos(115))
d^2 = 900 + 1089 - 1980cos(115)
d^2 = 1989 - 1980cos(115) take the positive square root of both sides
d = sqrt [ 1989 - 1980cos(115) ] = about 2825.8
