. Trigonometria. 5. A K the co-fine of DK will be AL the co-fine of £L will be £ 574947, and their difference is KL, or IE and in the triangle Dl£, the fides D I 27§ 5,andJ^ .^74947 being given, the fide DE is alfo given 415 3 3 5 518, by 47 of the 1. Bool^ of Euclid. 11 Having thus found thefe primary Sines, the fecondary Sines, or all the Sines remaining,are thus to be fought: By the 8 Probleme of the fecond hereof, feek the co-fine of , by the 15 or 16 Problemesof thefecond hereof, feek
. Trigonometria. 5. A K the co-fine of DK will be AL the co-fine of £L will be £ 574947, and their difference is KL, or IE and in the triangle Dl£, the fides D I 27§ 5,andJ^ .^74947 being given, the fide DE is alfo given 415 3 3 5 518, by 47 of the 1. Bool^ of Euclid. 11 Having thus found thefe primary Sines, the fecondary Sines, or all the Sines remaining,are thus to be fought: By the 8 Probleme of the fecond hereof, feek the co-fine of , by the 15 or 16 Problemesof thefecond hereof, feek the Sine of 6* degr. andtheco -fine of6, by tne 17 of the fecond; and in like manner, the Sines and Co-fines of 3 degr. ideg. 50 cen-tefmes, , 37* millefimals, 1875 parts of a degree, and fo the half continually, as farasyoupleafe. Thefe few following we deem diffident for our prefent purpofe: for that bythefe the Sine of one centefm may be exadly enough found, as by the work it felf it doth ap-. pear. A Triangle or fubtenfe of no A Decangle or fubtenfe of 36 fide of ^A quinquangle or fubtenfe of 72 qnindecangle or fubtenfe of 24 deg. The Sines a/id Co-fines. OO 6. 00 3. 00 I. 50 o. 75 o- 375o. 1875o. 09375o. 046875 o. 0234375 5*33-595, ^ ^54-49379 J775967654 o. 01171875! 9781499452998629996599991999919999999999999999999999999 .76007. 18953- 95347.,73249. •,46453 7439°, .99790 3380668273 5457475557 ,7400763997371063886480505 3341083831 From the Sine of o deg. 01171875 parts of a degree( the Sine of one centefm is thus foundby the Rule of proportion : As pdeg. 01171875 parts of adegree, Is to the Sine thereof :So is one centefm, To the Sine thereof, And the Co-fine,(by the 8. of the f
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Keywords: ., bookcentury1600, bookdecade1650, bookidtrigonometri, bookyear1658
