BPAin,EHIiI 3EMJm HA B03MyUl,EHIfl BT> ATMOCO'EP'B. 87 



Cii ApyroH CTopoHbi, pasA'feJiflfl paseecTBO (107) na t, nojiyqHM'fc si iipe^'feJii: 



1^=0 (114). 



( eyj Jo ^ ^ 



PaBeHCTsa (113) h (114) npoTHBopiqaTi> Apyn. Apyry, a xaKi KaKT> cnpaBCAJinBOCTt 

 paeeHCTBa (114) HecoMHiHHa, to paBCHCTBO (113) — a6cypAi>. OxcwAa saKJiioMaeMTj, hto npeA- 

 nojioateHie (110), KOTopoe npHBejio nact kt> ueBipnoMy aaKJiroqcHiK), HeocHOBaiejibHo, h cjii- 

 AOBaxejibHO: 



\vri\o>0 (115). 



CpeAnojioacHM^ lenepb, ixo { £•/] ]q ecxb etKoxopaa Koeeqeafl Bejin^inna. 

 HmeMT) npeAtjiX) Bbipaateaia: 



I 1 1 i Cos'x ) i Cosu ) 



U*i io I n )o ( ^r{^ io 



dot „. 

 -r- Sin a 



=--^'' 



IlojibsyflCb paBCHCXBaMH (109) h (112), HaxoAHM-b: 



CoKpaxHB-b 3X0 paBeecxBO ea KOHeiHyio BejiB^nny {cY]}o mh nojiyHHMi ypaBHeuie, xoatAe- 

 cxBeHHoe cb paBencxBOMT. (118), oxKyAa h 3aKJiK)qaeMT>, mo npedrhAz {cY]}o MOMems 6bimb ko- 

 HeuHOu eeAUHuuou. 



HaKOHen,!) npeAnojioatHiyn), qxo: 



\vr,\o = oo (116). 



Ha^HAGM'b npeA'feJi'b BbipaHenia 



vri Cos a 



no cnocoSy nponsBOAHbix'b (seaqeHie HeonpeAt.iennocxn ^). 

 HM'feeM'b: 



{£-/lCos«}„=j-f-|=0^) (117). 



( Cos a Jo 



Ct) ApyroH cxopoHbi, po3biCKHBafl xoxi-»e npeA'fej'b kbkT) HeonpeAijeHHOCib %, nojiy- 



1 / Cos a •k 



I £r) Jo 



|£-/lCosa}o=f^'\=±oo (118). 



PaBeHCTBa (117) n (118) npoxHBopiiax^ Apyn. Apyry, oxKyAa aiAyexi, qxo npeAno- 

 Jioateme (116) omnooiHO. 



1) IIponycKaesn, npoMe>KyTO'iHtia CTaAi" Bbi'iiicacHia, npiiJitHaBmiHCH y>Ke ABa paaa. 



