推 superkill:柱坐標代換@@ 61.228.52.39 07/06
推 cinedy:那~為什麼r的範圍是0~acosθ呢? 218.168.13.174 07/06
推 cinedy:@@ 我知道了 218.168.13.174 07/06
推 superkill:- -a 61.228.52.39 07/06
→ superkill:我剛看到正要回的說 =_= 61.228.52.39 07/06
→ superkill:您真神 orz 61.228.52.39 07/06
推 cinedy:^^" SORRY 剛重畫一次圖就看到了 218.168.13.174 07/06
→ cinedy:還是感謝^^ 218.168.13.174 07/06
推 superkill::) 61.228.52.39 07/06