. Trigonometria. As the Radius AD 90 To the tan gent D G 30 So the fine AB 47 To the tangent B C 9-75^ P R O B L. 5. A leg, with (MAngle oppofite thereunto-, being given,to find the other leg. If it be known whether it ofthe Hypotemfa be more or lejfe then a quadrant, or whether the other angle be acute or the rectangular triangle ABC, the leg A B is inquired jf CLeg BC given I .l?AngleBAC 30 The terms of proportion. At the tangent of the oblique angle given, 7C So the tangent of the leg the Radius .* QTo the fine of t
. Trigonometria. As the Radius AD 90 To the tan gent D G 30 So the fine AB 47 To the tangent B C 9-75^ P R O B L. 5. A leg, with (MAngle oppofite thereunto-, being given,to find the other leg. If it be known whether it ofthe Hypotemfa be more or lejfe then a quadrant, or whether the other angle be acute or the rectangular triangle ABC, the leg A B is inquired jf CLeg BC given I .l?AngleBAC 30 The terms of proportion. At the tangent of the oblique angle given, 7C So the tangent of the leg the Radius .* QTo the fine of the leg inquired. Axiom Chap* 2, • Illustration Arithmetical. As the tangent DG 30 To the Radius A D 90 So the tangent B C To the fine of A B 47 ^89412746 V pROBt. Tngowmetria Britannka. T R O B L. 6. The Hypotenufa and an angle given, to find the leg conterminate with the given Angle. In the reaangular triangle ABC, the leg B C is inquired *\ Hypotenufa A C given < £ Angle B C A The terms of proportion. ^r* As the Radius,^ }To the tangent of the Hypotenufa :2 S So fine compl. of the angle given,q^To the tangent of the leg inquired. Axiom I.
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Keywords: ., bookcentury1600, bookdecade1650, bookidtrigonometri, bookyear1658
