1.∫(2-sec^2(x))*dx 2.∫(cos2x/sin^2(x))dx
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1.∫(2-sec^2(x))*dx 2.∫(cos2x/sin^2(x))dx
陈景润啊华罗庚,
陈景润啊华罗庚,
![1.∫(2-sec^2(x))*dx 2.∫(cos2x/sin^2(x))dx](/uploads/image/z/19870492-4-2.jpg?t=1.%E2%88%AB%282-sec%5E2%28x%29%29%2Adx+2.%E2%88%AB%28cos2x%2Fsin%5E2%28x%29%29dx)
1、∫(2-sec²x)dx = 2x-tgx+c
2、∫(cos2x/sin² x)dx=∫[(1-2sin²x)/sin² x]dx
=∫[(csc²x -2)dx=-cotx-2x+c
2、∫(cos2x/sin² x)dx=∫[(1-2sin²x)/sin² x]dx
=∫[(csc²x -2)dx=-cotx-2x+c