Hoe converteer je 9 = (2x + y) ^ 2-3y-x in poolvorm?

Hoe converteer je 9 = (2x + y) ^ 2-3y-x in poolvorm?
Anonim

Antwoord:

# R = 9 / (2 (cos ^ 2 theta + 1) + 2sin (2 theta) -3sintheta-costheta) #

Uitleg:

We zullen gebruiken:

# X = rcostheta #

# Y = rsintheta #

# 9 = (2rcostheta + rsintheta) ^ 2-3rsintheta-rcostheta #

# 9 = r ((2costheta + sintheta) ^ 2-3sintheta-costheta) #

# R = 9 / ((2costheta + sintheta) ^ 2-3sintheta-costheta) #

# R = 9 / (4cos ^ 2 theta + + 4costhetasintheta 2sin ^ 2teta-3sintheta-costheta) #

# R = 9 / (2 (2cos ^ 2 theta + sin ^ 2 theta) + 2sin (2 theta) -3sintheta-costheta) #

# R = 9 / (2 (cos ^ 2 theta + 1) + 2sin (2 theta) -3sintheta-costheta) #