Part d a student solving a physics problem to find the unknown has applied physics principles and obtained the 6- mgsin 0-ma, where ge 9.80 meter seconda a = 3.60 meter second2 ? = 27 0°, and m is not given. which of the following represents a simplified expression for ? gcos ? to avoid making mistakes, the expression should not be simplified until the numerical values are o substituted o the single equation has two unknowns and cannot be solved with the information given.