The mathematical coordinate system and parameter equation in senior high school need approximate process.
P = (2 √2) cos θ p 2 = 2 √ 2pcos θ becomes a rectangular coordinate system x 2+y 2 = 2 √ 2x2+y 2 = 2 (x-√ 2) 2+y 2 = 2, and the center c is (√ 2,0).
Hope to adopt thank you.