Use an addition formula to derive the identity. cos x - = sin x . . . . . Which addition formula should be used? COs (A + B) O sin (A + B) What is the addition formula for cos (A + B)? O A. cos (A + B) = cos A cos B + sin A sin B O B. cos (A + B) = sin A cos B - cos A sin B C. cos (A + B) = cos A cos B - sin A sin B O D. cos (A + B) = sin A cos B + cos A sin B O E. cos (A + B) = sin A sin B - cos A cos B OF. cos (A + B) = cos Asin B + sin A cos B Apply the addition formula for cos (A + B) to the left side of the given identity. cos x- 2 = cos () cos ( ) - sin () sin () (Type the terms of your expression in the same order as they appear in the original expression. Type exact answers, using it as needed.)