- #1
Whatupdoc
- 99
- 0
how would i find the anti-derv. of (cos(2x)). I am really confused with sub.
ok i'll use u-du
u = 2x
du = 2 dx
dx = 1/2 du
k so... cos(u)*dx
since the dx is there, you plug in the dx that i found right? so... sin(2x)1/2
ok so that's a simple integration problem, can someone give me a harder problem and show me how to find "dx", that's what I am really confused about.
ok i'll use u-du
u = 2x
du = 2 dx
dx = 1/2 du
k so... cos(u)*dx
since the dx is there, you plug in the dx that i found right? so... sin(2x)1/2
ok so that's a simple integration problem, can someone give me a harder problem and show me how to find "dx", that's what I am really confused about.