. , , , , .. . .
, . .
y = f(x) [a; b] ( , ). G, y = f(x), y = 0, x = a x = b, . S(G).
. , . [a; b] n , , , , , P Q G.
, n, , - , s S [a; b]. . , , .
, y = f(x) . .
, , , y = f(x), y = 0, x = a x = b.
31. .
1. .
: , .
Dy=ydx
∫sinx cosx dx=/sinx=t dsin=d(t) sinx dx=t*dt cosxdx=dt/ =∫tdt =t2/2+C=sin2x/2 +C
2.
, .
. Vdy .