Verify the identity. sin (3x) - sin(x) cos (3x) - cos(x) == - cot (2x) Start with the numerator of the left side and apply the appropriate formula of sum-to-product. sin (3x)- sin (x)=(Do not simplify.) Now use the sum-to-product formula on the denominator of the left side. cos (3x) - cos (x) = (Do not simplify.) In the numerator and denominator, substitute the expressions found in previous steps. Apply an appropriate identity to simplify the expressions. B (Simplify your answer.) The fraction from the previous step then simplifies to cot (2x) using what? OA. Reciprocal Identity OB. Quotient Identity OC. Pythagorean Identity OD. Even-Odd Identity 80 F3 2 13 3 3 S 4 a A F4 어요 F5 MacBook Air % 5 6 F6 87 & 7 Time Remain DII DD F7 བ F8 པ F9 F10 F E R T Y U D F G H * 8 د ( 9 O O P K L