transcription: | A = Ï€r2 |C = 2Ï€r sin COS If I slicing cheese, I slicing the holes too? tan 30Â° 45Â° 60Â°â° 1 âˆšâˆš2âˆš3 INN -72251 145 2x 30Â° xâˆš3 5 NIN 2 âˆš3 60% x [sinxdx==cosx+C dx COS X ftgxdx=-Incos x + dx sin x tgx+C, Intg +C dx aÂ²+xÂ² a dx arctg In V ==Tr =h tan (8) 10 5 h efrad V = rÂ²h axÂ²+bx+c=0 a(xÂ²+Â²x+5)=0 r 2Â²+2+Â²-Â² 2a bÂ²-4ac 0