<prompt> Kwa c, ya mara kwa mara katika kuratibu za silinda r,theta,z, pata umbo lililoelezewa na mlinganyo.theta c.A MstariB MduaraC NdegeD TufeE SilindaF KoniIngiza herufi ya chaguo sahihi.  <response>: Katika viwianishi vya silinda, theta inaashiria pembe ya uhakika na mhimili chanya x. Kwa hivyo, kwa pembe iliyowekwa theta c, pointi zote ziko kwenye ndege. Jibu ni textC. Kumbuka kuwa tunaweza kupata pointi zote kwenye ndege hii kwa kuchukua r negative.asykuagiza tatu;kuagiza yabisi;ukubwa 200;makadirio ya sasa mtazamo 6,3,2;mwanga wa sasa 1,0,1;theta halisi 150;kuchora0,0,0---2,0,0;chora0,0,0--0,-2,0;kuchorausoCostheta,Sintheta,1--Costheta,Sintheta,-1--Costheta 180,Sintheta 180, -1--Costheta 180,Sintheta 180,1--mzunguko, kijivu0.7,nolight;kuchora0,0,0--2,0,0;chora0,0,0--0,2,0;chora0,0,-1.5--0,0,1.5;kuchora1.5Costheta,1.5Sintheta,0--1.5Costheta 180,1.5Sintheta 180,0;kuchora0.5,0,0..0.5Costheta2,0.5Sintheta2,0..0.5Costheta,0.5Sintheta,0 ,nyekundu,Mshale36;chora0,0,0--0,-1,0, iliyokatika;chora0,0,0---2,0,0, iliyokatika;lebotheta, 0.7,0.6,0, nyeupe;lebox, 2,0,0, SW;leboy, 0,2,0, E;leboz, 0,0,1.5, N;lebotheta c, Costheta,Sintheta,-1, SE;asy 