These points are also on the negative side of the x axis, at -pi/4 and -pi/2. When we move along the x axis, notice what happens to the y value. On the left side of zero, tangent is negative. At x=-pi/4, tangent=-1.
The Independent Online. David Cameron may have called a referendum on the EU to blackmail Europe, according to Vladimir Putin. The Russian president also questioned Mr Cameronâs decision to call the vote, as it has caused a âgreat problemâ.
Russian President Vladimir Putinâs seizure of the Crimean Peninsula from Ukraine in early 2014 was the most consequential decision of his 16 years in power. By annexing a neighboring countryâs territory by force, Putin overturned in a single stroke the assumptions on which the postâCold War European order had rested.