导读 已知弦长L=30 弧长C=32.3。求圆心角A及圆半径R?Rn+1=(1+(L-2*Rn*SIN(C/(2*Rn)))/(L-C*COS(C/(2*Rn))))*RnR0=20R1=22.862R2=24.21R3=24.43...
已知弦长L=30 弧长C=32.3。
求圆心角A及圆半径R?Rn+1=(1+(L-2*Rn*SIN(C/(2*Rn)))/(L-C*COS(C/(2*Rn))))*RnR0=20R1=22.862R2=24.21R3=24.434R4=24.439R5=24.439R=24.439A=C/R =32.3/24.439 =1.32166弧度 =1.32166*180/PI =75.725度L=180分之nπR。