z
A(x, y, z)
y
:
x = j(t); y = y(t); z = f(t);
- : .
, - t. t .
t0:
- (t). .
,
,
.
, - t.
; ;
, j¢(t), y¢(t), f¢(t),
.
:
x = j(t); y = y(t); z = f(t);
(x, y, z) -
.. - , ,
.
:
. , t = p/2.
, , :
x(t) = cost; y(t) = sint; z(t) = ;
:
x¢(t) = -sint; y¢(t) = cost;
x¢(p/2) = -1; y¢(p/2) = 0; z¢(p/2)=
x(p/2) = 0; y(p/2) = 1; z(p/2)= p /2
- .
:
, :
,
y = f(x).
:
. t, j¢(t) y¢(t) . t .
(t1, t2), (t2, t3), , (tk-1, tk) (x1, x2), (x2, x3), , (xk-1, xk) , .
, , .
t, , t, .
, , .
|
|
, , , t .
.