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I(6)sin xdx=-d(cos x)cos xdx=d(sin x) (7) sec2 xdx=d(tan x) csc xdx=-d(cot x) (8)secx tan xdx =d(sec x) csc cot xdx==d(escx) H(9)Ti-r2dx=d(arcsinx) dx=d(arctan x) 1+x 例(1)「(3x+5)2t ∫Gx+y:(3x+5)=Jx+5d(3x+5) 3 (3x+5)+c (2) d x 4-5x ∫(-5x)2ak=(4-5)2(-(4-5x) ∫4-5504-5)=-4-5xy2+ 58 (6)sin xdx = −d(cos x) cos xdx = d(sin x) sec (tan ) 2 xdx = d x csc (cot ) 2 xdx = −d x sec x tan xdx = d(sec x) csc x cot xdx = −d(csc x) (arcsin ) 1 1 2 dx d x x = − (arctan ) 1 1 2 dx d x x = + (7) (8) (9) 例(1) 2 (3 5) x + dx ∫ 2 1 (3 5) 3 = ⋅ (3 5) x + d x + ∫ ∫ = (3 + 5) (3 + 5) 3 1 2 x d x = x + + c 3 (3 5) 9 1 ∫ − dx 4 5x 1 1 2 (4 5 ) x dx − = − ∫ 1 2 ( 1 ( ) (4 ) 5 4 ) 5x d x5 − =− ⋅ − − ∫ ∫ = − − − − (4 5 ) (4 5 ) 5 1 2 1 x d x 1 2 2 (4 5 ) 5 = −− + x c (2)
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