A.= S=

RUIEASSIEEE 13

Quaritur arcus ei competens.

Sinus datus in canonis ſua parte nempe areis quæſitus noninvenitur præciſè. Sed eo minor proximsè eſt 3, 502, 075. Ergodifferentia hujus à dato eſt 908.

jam proximè ſequens ſinus eſt 3, 504, 799. ergo differentia hu-jus& proximè præcedentis eſt 2, 724.

Tertio finui proximè ſequenrti- competit arcus gr. 20, 31 præ-cedenti gr. 20,30. Ergo differentia eſt ſcrup. primum. quantaſemperhic eſt ur ſequens typus monſtrar.

Da. ſe. 3,504, 799 Dat. 3,502, 9831Q. 20, 31

Da. pr. 3,502, 075[pr. Qi. 20,301———

1

jam hinc concludenda eſt pars proportionalis congruens&6oſecundis differentiæ 90⁸. Ergo ſi differentia datorum vicino-rum 2,724 eſt ſecundorum 60, differentia 9os erit ſecundorum20. pro parte p. quæſita.

12 908 60 20.

jam ſi hæc addatur quæſito proximè præcedenti erit quæſi-tus arcus. grad. 20, 30,209. Si modo arcus quærendus fuit qua-drantis peripheria minor. Nam ſfinus datus per d. e. 5 compe-rit etiam grad. 159, 29 4 peripheriæ nempe reliquæ ad ſemi-peripheriam.

Quod jam inſcriptarum& ſinuum ſecundorum inventionemattinet: ea his cognitis per 10,1⁷,& 18. e. 5 non eſt obſcura. Si eniminſcripta arcus gr. 44& 4οſecundorum quæratur: quæretur fi-nus lemiſsis nempe gr. 20,30, 207. Sinus inventus 3,502, 983 ſiduplicetur eſt quæſita inſcripta tempe 7,005, 966.

Rurſus ſi quæratur arcus inſcriptæ 7,005, 966 inſcriptæ dimi-diæ tanquam ſinus 3,502,983 arcum quæro nempe gr. 20, 30, 20.is duplicatus eſt arcus quæſitus.

Queæ