知道弦长L=3.2,弧长C=3.33怎么求半径R?
Rn+1=(1+(L-2*Rn*SIN(C/(2*Rn)))/(L-C*COS(C/(2*Rn))))*Rn
R0=3
R1=3.311
R2=3.412
R3=3.412
R=3.412