已知弦长L=12米,弧长C=12.5,求半径R?
Rn+1=(1+(L-2*Rn*SIN(C/(2*Rn)))/(L-C*COS(C/(2*Rn))))*Rn
R0=10
R1=11.6
R2=12.477
R3=12.673
R4=12.68
R5=12.68
R=12.68