<prompt> Kwa c, ya mara kwa mara katika kuratibu za duara rho,theta,phi, pata umbo lililoelezewa na equation.phi c.A MstariB MduaraC NdegeD TufeE SilindaF KoniIngiza herufi ya chaguo sahihi.  <response>: Katika kuratibu za duara, phi ni pembe kati ya nukta na mhimili chanya z.asykuagiza tatu;ukubwa 180;makadirio ya sasa mtazamo 6,3,2;triple sphericaltorectangular rho halisi, theta halisi, phi halisi kurudi rhoSinphiCostheta,rhoSinphiSintheta,rhoCosphi;mara tatu O, P;O 0,0,0;P sphericaltorectangular 1,60,45;kuchorausoO--P--P.x,P.y,0--cycle,kijivu0.7,nolight;choraO--1,0,0,Arrow36;choraO--0,1,0,Arrow36;choraO--0,0,1,Arrow36;kuchoraO--P--P.x,P.y,0--mzunguko;chora0,0,0.5..sphericaltorectangular0.5,60,452..sphericaltorectangular0.5,60,45,Arrow36;chora0.4,0,0..sphericaltorectangular0.4,30,90..sphericaltorectangular0.4,60,90,Arrow36;lebox, 1.1,0,0;leboy, 0,1.1,0;leboz, 0,0,1.1;lebophi, 0.2,0.25,0.6;lebotheta, 0.5,0.25,0;leboP, P, N;asyKwa hivyo kwa pembe iliyowekwa phi c, tunapata koni. Jibu ni textF.asykuagiza tatu;kuagiza yabisi;ukubwa 150;makadirio ya sasa mtazamo 6,3,2;mwanga wa sasa mwanga 5,5,1;mara tatu I 1,0,0, J 0,1,0, K 0,0,1, O 0,0,0;mapinduzi downconeconec 5K,r 5,h -5;kuchorausodowncone,kijivu0.99;chora-6I--6I, Arrow36;chora-6J--6J, Mshale36;chora4.5K--6K, Arrow36;lebox, 6.5I;leboy, 6.5J;leboz, 6.5K;asy 