. . , (.23), SAB , ( αAB rAB),
: (XA, YA), SAB αAB. : (XB, YB). :
ΔX = XB XA; ΔY = YB YA.
ΔX ΔY . . :
ΔX = SAB cos αAB; ΔY = SAB sin αAB.
SAB , ΔX ΔY cos αAB sin αAB. ΔX ΔY .1.
1. ΔX ΔY
I () | II () | III () | IV () | |
ΔX | + | + | ||
ΔY | + | + |
:
ΔX = SAB cos rAB; ΔY = SAB sin rAB.
, :
XB = XA + ΔX;YB = YA+ ΔY.
, (XA, YA) (XB, YB) SAB : rAB αAB (.24).
:
ΔX = XB XA;
ΔY = YB YA.
rAB
ΔY | = tg rAB |
ΔX |
SAB= | ΔX | = | ΔY | = ΔX sec rAB = ΔY cosec rAB |
cos rAB | sin rAB |
SAB= | ΔX | = | ΔY | = ΔX sec αAB = ΔY cosec αAB |
cos αAB | sin αAB |
SAB :
SAB
.
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