Question

已知2弧度的圆心角所对的弦长为2，那么这个圆心角所对弧长为

具体步骤谢谢

Answer 1

已知的圆心角A=2弧度所对的弦长为L=2，那么这个圆心角所对的弧长为C
圆半径为R=(L/2)/SIN(A/2)
=1/SIN(2/2)
=1/SIN(1弧度)
=1/SIN(1*180/PI度)
=1/SIN(57.2961度)
=1.1884
C=A*R=2*1.1884=2.3768

Answer 2

已知的圆心角a=2弧度所对的弦长为l=2，那么这个圆心角所对的弧长为c
圆半径为r=(l/2)/sin(a/2)
=1/sin(2/2)
=1/sin(1弧度)
=1/sin(1*180/pi度)
=1/sin(57.2961度)
=1.1884
c=a*r=2*1.1884=2.3768