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.
The peninsula of Crimea in southern Ukraine is at the centre of what is being seen as the biggest crisis between Russia and the West since the Cold War.rimea is an autonomous republic within Ukraine, electing its own parliament, with a prime minister appointed with approval from Kiev. But now Crimean MPs have appointed a pro-Moscow leader, Sergei Aksyonov, who wants Crimea to unite with Russia, and has called the referendum.