已知扇形半径为R=600cm,弦长为L=155.3cm,如何计算弧长C?
弧所对的圆心角为A.
A=2*ARC SIN((L/2)/R)
=2*ARC SIN((155.3/2)/600)
=14.87度
=14.87*PI/180
=0.259261弧度
C=R*A=600*0.259261=155.74cm
已知扇形半径为R=600cm,弦长为L=155.3cm,如何计算弧长C?
弧所对的圆心角为A.
A=2*ARC SIN((L/2)/R)
=2*ARC SIN((155.3/2)/600)
=14.87度
=14.87*PI/180
=0.259261弧度
C=R*A=600*0.259261=155.74cm