例6求下列函数的导数 (y=x+log3x (2)∫(x)=xlnx·sinx (3y=tanx (4)y=secx 1-cos x (1)y'=(x3+log3x)=3x2+log3 x (2)f(r=(xInx.sin x) =lnx·sinx+sinx+xlnx·Cosx6 例6.求下列函数的导数 3 3 (1) log (2) ( ) ln sin (3) tan (4) sec 1 cos (5) 1 y x x f x x x x y x y x x y x = + =  = = − = − (2) '( ) ( ln sin )' f x x x x =  3 3 (1) ' ( log )' y x x = + 2 3 1 3 + log x e x = =  + +  ln sin sin ln cos x x x x x x