thank you very much :)
it so assigned:
Solve on interval <0;2*pi> non-equation: tgx>=sinx
Here is result
http://www.wolframalpha.com/input/?i=tgx%3E%3Dsinx+%26%26+x%3E0%3C2pi
but i dont know how to solve it
I got it
Melody and CPhill thank you very much and sorry for that thumbs
How did you get -2 from log6,25/log0,4
thx