Like with the previous problems, the answer comes fairly straight forward from the values of c and d.
c = 4 tells us we have a shift of 4 units to the left
d = 3 indicates we're shifting 3 units up.
Note: we shift left instead of right because x+c = x+4 means the xy axis has been shifted 4 units to the right, giving the illusion the cosine curve is shifted 4 units to the left.
