In the cover sheet, it is often placed in the middle of the sheet in a larger format, up to about 10 centimeters width/high. In the CV, the photo is often placed in a smaller format - perhaps 4 centimeters width/high - at the top right-hand or left-hand. Make sure that the photo has a good resolution. Further a classical business photo needs to be businesslike what means: shirt and possibly tie and jacket.
Here you find examples of proper business photos for job applications.