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., x P y P,. 1 x + y + c ) xc, yc, c ) dx a + x ) 3 x a a + x, a x + 1) a + x + 1 dx arctan ax a + x + 1 c x + y + c ) 3 1 S ab [,a] [,b] a b a b c a a a c [ arctan x P y P dxdy c x + y + c ) 3 1/c dydx x/c) + y + 1) 3 1/c)y dydx x/c) + 1) x/c) + y + 1 ] b c dx 1/c)b/c) x/c) + 1) x/c) + b/c) + 1 dx b/c x + 1) x + b/c) + 1 dx b/c)a/c) a/c) + b/c) + 1... )... 1 ), P ab S ab π, arctan ab c a + b + c. arctan ab c a + b + c π P ab π arctan π arctan ab c a + b + c. ab c a + b + c, P bc π arctan bc a a + b + c, P ca π arctan ca b a + b + c. ab 1/. 17

4.3. a b c. ) P ab P bc P bc π arctan 1 3 1 3,. c. ) P ab 1, P bc P ca. P ab 1, P bc P ca..p ab + P bc + P ca 1.) )x π/)p ab, y π/)p bc, z π/)p ca. tan x ab/c a + b + c ), tan y ab/a a + b + c ) x, y π/). tan x + y) tan x + tan y)/1 tan x tan y) b/ac) a + b + c.,arctan θ + arctan 1/θ) π/, x + y + z π/)p ab + π/)p bc + π/)p ca arctan b/ac) a + b + c ) + arctanca/b a + b + c )) π/., P ab + P bc + P ca 1. 4.4,,. a 1, b 1, c 1 ab.6366.6,.,. [3], p59.,.,,,,.. 18

[1], :,,. [] :, 9 C A. [3] :, 8 1, pp56 59,. [4] :, 9 1, pp6 66,. [Maple ] The Maple Maptools Package Maple. Maple Maptools example worksheet by: Vince Costanzo [update 9-jan-4]. worksheet The Maple Maptools Package http://www3.villanova.edu/maple/projects/costanzo/carto/index.htm). C:\local\maptools, Coastal point databases Fine resolution 9883 points). >restart; >libname : libname, "C:\\local\\maptools"; >withmaptools); >load"c:\\local\\maptools\\fine.m"); >f : x,y) -> x, y); >mapplotf, lonlat[-18*deg..18*deg, -8*deg..8*deg], meridian_spacing15*deg); f. >f : x,y) -> x, lntany/ + Pi/4))); >f : x,y) -> x, siny)); >f : x,y) -> *cosx)*cosy))/1-siny)), *sinx)*cosy))/1-siny))); 19