HSC Stuff > HSC Mathematics Extension 2
Nagisa Maths Thread
Planck's constant:
--- Quote from: brightsky on December 29, 2012, 12:07:52 am ---hint: multiply top and bottom by sqrt(1+x) and then split.
--- End quote ---
Nice trick.
Another is the substitution x=cos2a, the integrand quickly simplifies to cota, and dx/da = -4sina*cosa etc
Nagisa:
Evaluate
TrueTears:
Spoiler
Nagisa:
okay TT wat bout this one
Phy124:
Try a double substitution, firstly let to produce a new integral, then secondly let (or whatever letter you want to use for your second substitution) to simplify it again.
If you have any trouble with that I can write a full solution for you :)
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