nnnnnhamilton4468 nnnnnhamilton4468 24-04-2024 Mathematics Answered Using a double-angle or half-angle formula to simplify the given expressions. (a) If cos²(33 deg )-sin²(33 deg )=cos(A deg ), then A= degrees. (b) If cos²(4x)-sin²(4x)=cos(B), then B=