- #1
JasonHathaway
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- 0
Homework Statement
[itex]180\int_5^\propto \frac{2}{(4+x^{2})^{3/2}} dx[/itex]
Homework Equations
Trigonometric Substitutions: (x=2 tan z).
The Attempt at a Solution
I've computed the integral and ended up with [itex]180 [\frac{x}{2(4+x^2)^{1/2}}][/itex] from 5 to infinity.
I could've easily computed the limit of 5, but couldn't have found the limit approaches infinity, as I'm always ending up with 0, although my textbook and symolab calculator says that it's 1/2.