回答:
#r =(costheta-5sintheta)/(sin(2theta))#
説明:
これには2つの方程式を使います。
#x = rcostheta#
#、y = rsintheta#
#5rsintheta = rcostheta-2(rcos theta)(rsintheta)#
#5rsintheta = rcostheta-2r ^ 2costhetasintheta#
#5sintheta = costheta-2rcosthetasintheta#
#2rcosthetasintheta = costheta-5sintheta#
#r =(costheta-5sintheta)/(2costhetasintheta)#
#r =(costheta-5sintheta)/(sin(2theta))#