HSC 2015 MX2 Integration Marathon (archive) (1 Viewer)

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lita1000

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Re: MX2 2015 Integration Marathon

So if you rearrange you get :


Let u^2=cotx and after that your integral becomes:





Can you really make that substitution when clearly cot 0 is undefined?

Also, can you show ur working for how you went from the trig to the u bit? I don't think ur integrand is quite right....
 

InteGrand

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Re: MX2 2015 Integration Marathon

Can you really make that substitution when clearly cot 0 is undefined?

Also, can you show ur working for how you went from the trig to the u bit? I don't think ur integrand is quite right....


 

lita1000

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Re: MX2 2015 Integration Marathon

whoops yea i forgot about ur bounds
 

glittergal96

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Re: MX2 2015 Integration Marathon

Lol it's positive everywhere, its integral over the real line is definitely NOT 0.
 
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