Oliver Spryn
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 Mar 3 comment Find $\int e^{2\theta} \cdot \sin{3\theta} \ d\theta$ Thanks David. ;) Mar 3 answered Find $\int e^{2\theta} \cdot \sin{3\theta} \ d\theta$ Mar 3 comment Choices for Integrationg by Parts Hmmm... would $\frac{1}{{\left(2x + 1\right)}^{2}}$ have worked as u and $x \cdot e^{2x} \ dx$ as dv? Mar 3 asked Find $\int e^{2\theta} \cdot \sin{3\theta} \ d\theta$ Mar 3 accepted Choices for Integrationg by Parts Mar 3 comment Choices for Integrationg by Parts Errummm.... that was silly mistake. Ok, that was my problem! Thank you for pointing that out Mike! How could I have missed that? Mar 3 comment Choices for Integrationg by Parts If that is the case, then shouldn't the answer come out the be the same, regardless of what (within reason) I pick? Mar 3 comment Choices for Integrationg by Parts Thank Mike, but I did use v and du in the integral. Since I used integration by parts twice, maybe that is why it looks as though I had done that. Mar 3 asked Choices for Integrationg by Parts Mar 2 accepted Methodology for Integration by Parts Mar 2 comment Methodology for Integration by Parts Ah... good point, Antonio. Mar 2 comment Methodology for Integration by Parts Ah ha! Thank you for answering my second question! I figured that was why they chose $\sin{x}$ over $\sin^{n - 1}{x}$, but I just wanted to be sure that I wasn't missing some mathematical rule. Do you know why they decided to split up $\sin^{n}{x}$ into two terms and then let dv be $\sin{x} \ dx$ rather than the understood 1? Mar 2 comment Methodology for Integration by Parts Hmm... yes, but then I would like an explanation as to why the other methods wouldn't work. Mar 2 asked Methodology for Integration by Parts Feb 24 accepted Integrating $\int \sin^n{x} \ dx$ Feb 24 accepted Integrate $\csc^3{x} \ dx$ Feb 24 comment Integrate $\csc^3{x} \ dx$ Thank you for your help, Arturo! +1 answer accepted! Feb 24 asked Integrate $\csc^3{x} \ dx$ Feb 24 awarded Commentator Feb 24 comment Integrating $\int \sin^n{x} \ dx$ ... and Gerry!!