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Friday, May 29, 2020

Write multi-line equation in the blogger

After we involved the mathjax in the blogger (https://qinglanseyu.blogspot.com/2018/09/how-to-insert-formula-in-google-blogger.html), we can write multiple line equations very easy. We just need to add "\\" at the end of every single equation.
Example:

It will shown,
a+b=c+d=d+f.

Integration in the spherical coordinate

d3r=r2drsinθdθdϕ
Since dcos(θ)=sin(θ)dθ,
d3r=r2drdcos(θ)dϕ,
let μ=cos(θ),
π0d3r=π0r2drdcos(θ)dϕ=cos(2π)cos(0)r2drdμdϕ=cos(2π)cos(0)r2drdμdϕ=cos(0)cos(2π)r2drdμdϕ=11r2drdμdϕ

Wednesday, May 27, 2020

Hard reset for the Chromebook

Resting your Chromebook hardware, is called a hard reset.
It will restart your Chromebook hardware (like your keyboard and touch-pad), and might delete some files in your Downloads folder.

follow the steps below:

  1. Turn off your Chromebook.
  2. Press and hold Refresh  + tap Power 
  3. When your Chromebook starts up, release Refresh .

Or
Press and hold   + tap Power The computer turns off, and then turns on again.

Reference: