x )' sin x ;
( tgx )
1
' ;
cos 2 x
( ctgx )
'
1
sin 2 x
2
5. Endi y=arcsinx teskari trigonometrik funksiyaning hosilasini hisoblashni ko’raylik. y=arcsinx funksiya x=siny funksiyaga teskari funksiya bo’lgani uchun, teskari funksiyalarning hosilalariga ko’ra
y ' =
2
1 1 1 1 ( a r c s i n x ) ' = = = =
( s i n y ) ' c o s y
1 - s i n y
1 - x
( a r c s i n x ) ' =
1
2
1 - x
, ( - 1 <
x < 1) .
Xu ddi shu ningdek (a rccosx) ' 1 ;
1 x 2
( arctgx )
1
' ;
1 x 2
( arcctgx )
1
' .
1 x 2
1
6. y=lnx bo’lsa, y' . x '
x
1
; Agar y=lnu bo’lib u=f(x) bo’lsa,
x
u '
y ' (1 nu )'
u
f ( x )'
;
f ( x )
Agar y=uv( x)(x) bo’lsa, lny= vlnu - bu nda n hosila olsak
y '
v ' 1 nu
y
u '
v ,
u
y ' u
v
v ' 1 nu
v
u '
.
u
Do'stlaringiz bilan baham: |