Cast on 3 stitches at the beginning of next row

please tell me how to cast on 3 stitches at the beg and end of next row. I know how to knit in front and back of stitch to increase stitches, but this is an increase from back of head to form a hat across the forehead and needs to be cast on. Help anyone?

Use a knitted or cable cast-on. Cast them on to the left tip.