1. , .. , .
sin, cos. .. , J (t), sin, cos sin :
.
, .
. , (: 311 , 4,24 ), (: 220 , 3 ).
.. , ( , ).
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, ( ) ( , , ) , . , .
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( ) ( sin- cos-, ), .
2. , , ( Matlab, MathCAD .), :
1) () ( , ), ();
2) -
A x = B, (2)
A n × n (n = ); B - n ×1; x - n ×1;
3) (2)
x = A 1 B. (3)
, A B Matlab :
x = inv(A)*B
MthCAD , (3):
x:= A 1 B
3. cos- , .
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, :
,
, ,
.