- #1
Cali920
- 17
- 0
Homework Statement
∫tan3x dx
2. The attempt at a solution
∫tan x + ∫tan2x
∫tan x (sec2x - 1) dx
∫(tan x (sec2x - tan x) dx
∫tan x sec2x dx - ∫tan x dx
u = sec x
du = sec x tan x dx
∫tan x sec x sec x - ∫tan x dx
Now I'm stuck..
∫ du * u - ∫ tan x dx ?
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