已知直径为D=3867,扇形弧长两点直线距离为L=3600,求弧长C?
弧半径为R,弧所对的圆心角为A.
R=D/2=3867/2=1933.5
A=2*ARC SIN((L/2)/R)
=2*ARC SIN((3600/2)/1933.5)
=137.168度
=137.168*PI/180
=2.394035弧度
C=R*A=1933.5*2.394035=4628.87
已知直径为3867,扇形弧长两点直线距离为3600,求弧长
已知直径为D=3867,扇形弧长两点直线距离为L=3600,求弧长C?
弧半径为R,弧所对的圆心角为A.
R=D/2=3867/2=1933.5
A=2*ARC SIN((L/2)/R)
=2*ARC SIN((3600/2)/1933.5)
=137.168度
=137.168*PI/180
=2.394035弧度
C=R*A=1933.5*2.394035=4628.87