2AJC8TP
A complete and practical solution book for the common school teacher . .-. Sin28°+^=^, or sin28°=^=.55851. (6) But sin28°=.46947. (7) . .46947=.55851. (8) .55851—.46947=.08904 ... (1). (9) Let 15°=^, and 30°+g=g. or 30°=^=.5235. (10) .-. .5000=.52359. and .52359—.5000=.02359 . . (2)., (11) (1)—(2) =.06545, 15°—14°=1°21. (12) : 1° :: 08904 : .06545. (13) .. <^=1.3604or=l° 21 38. MENSURATION. 187 (14) 14°+1° 21 38= 15° 21 38. (15) .-. 0=15° 2138. (16) Let angle DOB=A=90°. (17) ... A 0=84° 38 13=angle DOH. (18) SinDOH=.96426+. (19) Multiply the diameter of the circle by .96426-j-, and the res
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