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.
Russians go to the polls on Sunday March 4 to elect a new president. Current Prime Minister Vladimir Putin is attempting to regain the post he held between 1999 and 2008. He has been a dominant force in Russian politics for more than a decade but his popularity has suffered recent setbacks.