c o s s i n (s i n c o s )(c o s
s i n s i n y x x x x x d y x x x x x x d x '=++-+⇒=+-+ 6.设函数()y y x =由方程33ln()cos x y x y x +=+确定,求
d y
d x 332231ln()cos (3)3sin cos x y x y x x y x y x y x x y
''+=+⇒+=-++ 352322
1()cos 33sin sin 3d y x x y x y x x y x
y x x y d x +---'∴==-+ 计算下列积分:
1.
00000111sin 3cos3cos3cos3333111sin 3393x x d x xd x x x xd x
x π
ππππππ=-=-+=+=⎰⎰⎰ 2.
()d ln ln(12ln )12ln 12l 12n x d x x C x x x ==++++⎰⎰
3.
2222e d 222x x x x x x x x x x de x e e xd x x e xe e C -------=-=-+=---+⎰⎰⎰
4. 23d 65x x x x +-+⎰ 23(5)(1)3126515
x A B A x B x x A B x x x x +=+⇒-+-=+⇒=-=-+-- 22312(5)d ln 65151x x x d x C x x x x x +--⎛⎫∴=+=+ ⎪-+---⎝⎭
⎰⎰ 5.
()222222222121111d arctan (1)11x x x x d x d x x C x x x x x x x +++⎛⎫==-=-++ ⎪+++⎝⎭
⎰⎰⎰ 6.
211111ln 2(2)2222d x x d x d x C x x x x x x x ⎛⎫==-=+ ⎪++++⎝⎭⎰
⎰⎰ 7. 1ln e 1211001ln 13d (1ln )ln (1)22x u e x x x d x u du u u x =+⎛⎫=+=+=+= ⎪⎝⎭⎰⎰⎰ 8.