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.
Preliminary results in Sunday's referendum on whether Ukraine's Crimea region should join Russia or become an independent state show overwhelming support for Russia. With 75% percent of the ballots counted, close to 96% of voters want to become part of that country, according to the Crimean Electoral Commission.