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.
Putin said Tuesday that Russia had to act as Ukraine's new government, backed by the United States and European powers, prepared to seize the state through terror and murders.. The main executors of this were nationalists, Russia-phobes and anti-Semites, he said.