已知扇形弦长L=290和半径R=2305/9 求弧长C?
弧所对的圆心角为A.
A=2*ARC SIN((L/2)/R)
=2*ARC SIN((290/2)/(2305/9))
=68.97度
=68.97*PI/180
=1.203681弧度
C=R*A=(2305/9)*1.203681=308.28
已知扇形弦长L=290和半径R=2305/9 求弧长C?
弧所对的圆心角为A.
A=2*ARC SIN((L/2)/R)
=2*ARC SIN((290/2)/(2305/9))
=68.97度
=68.97*PI/180
=1.203681弧度
C=R*A=(2305/9)*1.203681=308.28