已知弦长求弧长一条弧所对的圆心角为2rad,它所对的弦长为2,求这条弧的弧长(A)1/sin1 (B)1/sin2 (C) 2/sin1
问题描述:
已知弦长求弧长一条弧所对的圆心角为2rad,它所对的弦长为2,求这条弧的弧长
(A)1/sin1 (B)1/sin2 (C) 2/sin1
答
已知弦长求弧长一条弧所对的圆心角为2rad,它所对的弦长为2,求这条弧的弧长
(A)1/sin1 (B)1/sin2 (C) 2/sin1