ra1cosθ图像,

r=a(1-sinθ)的数学坐标图片
image file c6ra19606c-f1.tif
image file c7ra11514h-f2.tif
ra1,sa2,ta3,依次代入上 式就得到 ra1 cos(a1 n d sa
image file c5ra15992j-f6.tif