Analytische geometrie im raum: Uebersezt nach der zweiten (Google eBook)

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Contents

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Page 331 - = cos ß cos у — sin ß sin 7 cos а, — COS ß = COS a COS у — sin a sin y COS b, ' — cos у = cos a cos ß — sin a sin ß cos c. 4. Halbwinkel- und Halbseitensätze: sin — = l/ ""' v "/ "*" v" *•/ s _ . /sin (s — b) sin (sin — ( sin b sin с ein — — l/ coso - cos (o— a).
Page 331 - ЗЗиф* ftaben bie beiben anberen: cos ß = — cos a . cos у -+- sin a . sin y . cos b; cos у = — cos a . cos ß + sin a . sin ß . cos c.

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