Jika
Magnitud koordinat kartesia
Biarkan
Magnitud
Sudut
Perhatikan bahawa sudut diberikan dalam ukuran radian.
Bagaimana anda menukar 9 = (- 2x + y) ^ 2-5y + 3x ke dalam bentuk kutub?
9 = 4r ^ 2cos ^ 2 (theta) -4r ^ 2sinthetacostheta + r ^ 2sin ^ 2 (theta) -5rsintheta + 3rcostheta = r (sintheta (r (sintheta-4costheta) -5) + costheta (4rcostheta + 3) = rcostheta y = rsintheta 9 = (- 2 (rcostheta) + rsintheta) ^ 2-5rsintheta + 3rcostheta 9 = 4r ^ 2cos ^ 2 (theta) -4r ^ 2sinthetacostheta + r ^ 2sin ^ 2 (theta) -5rsintheta + = r (sintheta (r (sintheta-4costheta) -5) + costheta (4rcostheta + 3))
Bagaimana anda menukar 9 = (2x + y) ^ 2-3y-x ke dalam bentuk kutub?
Kita akan menggunakan: x = rcostheta y = rsintheta 9 = (2rcostheta + rsintheta) ^ 2-3rsintheta-rcostheta 9 = r ( R = 9 / (2costheta + sintheta) ^ 2-3sintheta-costheta) r = 9 / (4cos ^ 2theta + 4costhetasintheta + 2sin ^ 2theta-3sintheta-costheta) r = 9 / (2 (2cos ^ 2theta + sin ^ 2theta) + 2sin (2theta) -3sintheta-costheta) r = 9 / (2 (cos ^ 2theta + 1) + 2sin (2theta)
Bagaimana anda menukar 9 = (5x + y) ^ 2-2y + x ke dalam bentuk kutub?
R = 9 / (r (5costheta + sintheta) ^ 2-2sintheta + costheta) Untuk ini kita perlu: x = rcostheta y = rsintheta Substituting persamaan ini memberikan kita: 9 = (5rcostheta + rsintheta) ^ 2-2rsintheta + rcostheta 9 = r ^ 2 (5costheta + sintheta) ^ 2-2rsintheta + rcostheta 9 = r (r (5costheta + sintheta) ^ 2-2sintheta + costheta) r = 9 / (r (5costheta + sintheta) ^ 2-2sintheta +