4.41.2 Greatest hits from previous weeks

4.41.2.1 How to express trigonometric equation in terms of of given trigonometric function?

https://mathematica.stackexchange.com/questions/434/how-to-express-trigonometric-equation-in-terms-of-of-given-trigonometric-functio

 
How can I express a trigonometric equation / identity in terms of a given trigonometric function? 
 
using following trigonometric identities 
 
Sin[x]^2+Cos[x]^2==1 
Sin[x]/Cos[x]==Tan[x] 
...
 

- asked by Prashant Bhate (27 votes), answered by Simon (34 votes)

4.41.2.2 Learn Mathematica (Wolfram) Language in one day

https://mathematica.stackexchange.com/questions/138366/learn-mathematica-wolfram-language-in-one-day

 
Currently I am trying to learn Python. Searching for relevant material I came across 
 
X in Y minutes 
 
and books with titles such as Learn Python in one day, in 24 hours, etc. 
 
Similar material exists  ...
                                                                                  

                                                                                  
 

- asked by dimitris (26 votes), answered by masterxilo (11 votes)