Graph the following function y cos x 1 Which transformation is needed to graph the function y cos x 5 answer below Choose the correct 6 OA The graph of y cos x should be horizontally shifted to the left by OB The graph of y cos x should be shifted vertically down by units units 6 OC The graph of y cos x should be horizontally shifted to the right by T 6 OD The graph of y cos x should be shifted vertically up by units units