- #1
Zack88
- 62
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I have to evaluate the integral
problem: [integral] x^2 cos mx dx
my solution w/ steps: u = x^2, du = 2x. dv = cos mx, v = sin mx / m
(x^2)(sin mx / m) - [integral] (sin mx / m)(2x)
(x^2)(sin mx / m) - 2 [integral] (sin mx / m) (x)
(x^2)(sin mx / m) + 2 (cos mx / m) + c [is this correct?]
any help would be appreciated.
problem: [integral] x^2 cos mx dx
my solution w/ steps: u = x^2, du = 2x. dv = cos mx, v = sin mx / m
(x^2)(sin mx / m) - [integral] (sin mx / m)(2x)
(x^2)(sin mx / m) - 2 [integral] (sin mx / m) (x)
(x^2)(sin mx / m) + 2 (cos mx / m) + c [is this correct?]
any help would be appreciated.