The statement,
reflecting the graph of y = cos x across the y-axis is the same as reflecting
it across the x-axis is FALSE. I am hoping that this answer has satisfied your
query and it will be able to help you, and if you would like, feel free to ask
another question.
To find surface area you must find the area of the top, area of the bottom, area of the front side, area of the back side, area of the left side and area of the right side. Then you would add them together.