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.
(from CBS News) ISTANBUL â In Turkey, the government has declared victory in a referendum to change the constitution in ways that would give sweeping new powers to the president. The political opposition in the country â one of Americaâs NATO allies and a key partner in the fight against ISIS â has challenged the result, however, saying millions of votes should be recounted.