Find the rectangular coordinates of the point given in polar

Find the rectangular coordinates of the point given in polar coordinates. (9,120 degree) The rectangular coordinates are. (Simplify your answer, including any radicals. Type an ordered pair. Type an exact answer, using radicals as needed. Use integers or fractions for any numbers in the expression.)

Solution

rectangular coordinat= (9cos120, 9sin120) = (-9/2 , (93)/2)