An Elementary Treatise On Plane Spherical Trigonometry With Their Application
An Elementary Treatise On Plane Spherical Trigonometry With Their Application
Benjamin Peirce
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T. XIX 2. 617 2d ang. = 50° 21' tang. 0. 0816 ^f X25"=ll"=cor. T. L 38° cotan. 0. 1072 By Table XII 1' 13" P. L. 2. 1701 47" 2. 3589 Cor. Table XLVIII = 2" 17" — 47' + 17" = V 47". 104] LONGITUDE. 333 True from apparent distance. 15. Calculate the corrections of Tables XLVIII, XLIX, and L, when the apparent distance is G0°, the moon's appa- rent altitude 59°, the planet's apparent altitude 30°, and its horizontal parallax 30/^ Ans. Cor. Table XLVIII = V 2i" XLIX zz:— 2F L — — 18^ 16. Find the ...correction of the table [B. P. 245. ] for the interval of 2^ 30"", and the difference of the Proportional Log- arithms equal to 88. Ans. 15 ^ 17. If the observed distance were 45° 34' 10", the moon's apparent altitude 22° 19', its horizontal parallax 60' 19", the planet's apparent altitude 42° 12', its horizontal parallax 15". 3 ; what is the true distance. Solution. L In this case m = 60°12'28" aziz 42° 12' ^a=:51" a'=:42 11 9 &:= 22 19 " ^6 — 53' 31" 6' — 23 12 31 a'+h'= 65 23 40"— N.
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