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 Russian Federation opposes the annexation label, with Putin defending the referendum as complying with the principle of self-determination of peoples. In July 2015, Russian prime minister Dmitry Medvedev said that Crimea had been fully integrated into Russia.