. Trigonometria. A C D is inquired, The given* x Super. Scheam, CAC , < ?Angle ADC 36-131* 2 Infer. Scheam30 IP The terms of the For the fegment of the vertical angle, by the 6 frobl. *3r &4s the Radius, 3 ytothetarigent of the angle given ; g % So the cofine of the Hypotenufa, thd co-tangent of the fegment of the vertical angle, 2 For the angle inquired, Confett. 7. As the tangent of the fide oppofite to the angle given,)To the tangent of the other given fide :\ So the cofine of the fir ft fegment,To the cofine of the fecond fegment. If the
. Trigonometria. A C D is inquired, The given* x Super. Scheam, CAC , < ?Angle ADC 36-131* 2 Infer. Scheam30 IP The terms of the For the fegment of the vertical angle, by the 6 frobl. *3r &4s the Radius, 3 ytothetarigent of the angle given ; g % So the cofine of the Hypotenufa, thd co-tangent of the fegment of the vertical angle, 2 For the angle inquired, Confett. 7. As the tangent of the fide oppofite to the angle given,)To the tangent of the other given fide :\ So the cofine of the fir ft fegment,To the cofine of the fecond fegment. If the perpendicular fall within the triangle, the fum;ft without, the difference is the angle inquired. Illuftratiou ^Arithmetical. As the Radius DS <?oTo the tangent of S O So the cofine of C D, D T 60To the tangent of T P 3 027 Complement is TV=L I 57-6973? the meafure of 2 thefideAC—FM the tang, of the fide D C=iL G 30So the cofine of L I, viz,. IR 027. To the cofine of IF, IQTherefore the arch IFAnd the firft arch found LISum of the vertical angles 46.^020 Z 2 3063 Jfegment DC B, $ The angle A C D inquired. tn 88 Trigonometria Brkannica. In the triangle of the inferiour Scheam. As the Radius DS 90To the tangent of S O 4^.3020 So the co-fine of CD ■2 5 3 3 To the tangent of T P 37-808? Complement is TV= LI 52*1915 2 Operation. As the tangent of the fide AB=FM3© *143937 To the tangent of the fide DC=LG So the co-fine of L I, v*x. IR 2 1 ■.■• To the co-fine of IF,f/*.. I j£. 71-9197 Therefore the arch IF But the arch found is IL The difference is F L ^9-98271035 the meafure of the ang. DC Ac PROBL. 9. Two angles and a fide oppofite to either of them given, to finde the ot
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