User:Cmkpl

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M.C. Chan (born August 2, 1987), is a boy, commonly known as Harold Chan. He called himself cmkpl and dustman on the internet. He owns a website starhouse. He has a brother, called John Chan. He lives in Tai Po, Hong Kong. He is studying in a university called CUHK (BEng InfoE). He likes designing computer programs, and also, he likes sleeping, hiking, cycling, reading, writing, etc.



Contents

[edit] Personal Quote

  • "Senseless guys do senseless things"
  • "Hey"
  • "What?"
  • "Hum?"
  • "..."
  • "Stupid Guy"
  • "hehe"

[edit] How does his brother comment on him?

  • "M.C. Chan is a bad guy!"
  • "Go to do your work!"

[edit] His product

  • WikiRootry
  • Jaunt Web Server
  • Comet Web Server

[edit] An Interesting Proof

Provided by his friend
2\int_{0}^{1}\frac{\, dx}{\sqrt {1-x^2}} = 2\int_{0}^{\frac{\pi}{2}}\frac{\cos x \, dx}{\sqrt {1-\sin ^2 x}}= 2\int_{0}^{\frac{\pi}{2}}\frac{\cos x \, dx}{\cos x}=2\int_{0}^{\frac{\pi}{2}}\, dx= 2 \left[\frac{\pi}{2}-0\right]=\pi

in fact, you must assume that 1 = \sin \frac{\pi}{2} (how can we use the result of the proof to do the proof?)

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