Quantum redactiones paginae "Usor:Tchougreeff/QUOMODO sive HOW To/PRINCIPIA CALCULI DIFFERENTIALIS ET INTEGRALIS ITEMQUE CALCULI DIFFERENTIARUM FINITARUM AUCTORE ANDREA CARAFFA E SOCIETATE IESU ROMAE TYPIS IOANNIS BAPTISTAE MARINI ET SOCII MDCCCXLV" differant

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<math>\Delta\cos\theta = \chi(\Delta\sin\theta\cos\omega, \Delta\sin\theta\sin\omega)</math> :
habita <math>\Delta</math> pro functione reliquarum <math>\theta</math> et <math>\omega</math>, sume <math>u = \theta,
v = \omega</math>; obvenient <math>f.'_u = f'_{\omegatheta} = \Delta'_{\theta}\sin\theta\cos\omega + \Delta\cos\theta\cos\omega , f'_v = f'_{\omega} = \Delta'_{\omega}\sin\theta\cos\omega - \Delta\cos\theta\cos\omega ,
f,'=f'. - A', \sin\theta\cosa-\Delta\sin\theta\sin\omega, f.'=f'\omega =\Delta sin\theta\sin\omega +
\Delta\cos\theta\sin\omega , f/ = f, = \Delta', sin\theta\sin + \Delta\sin\theta\cos\omega, 3. =