设L是圆周x=acost, y=asint (),则/ananas/latex/p/21409/ananas/latex/p/2330162
设L是圆周x=acost, y=asint (),则/ananas/latex/p/21409/ananas/latex/p/2330162
1
设L是圆周x=acost, y=asint (),则/ananas/latex/p/21409/ananas/latex/p/2330162