Verify that
sin 2x = 2 cot x sin^2 x
is an identity.

What is the slope of the line that passes through the points (–9, 2) and (0, 4)? the slope of the line is

Find the value of x to the nearest tenth.

The hockey team has been great! in 2008, they won 20% more games than in 2007 in 2009 they won 50% more games than in 2008 what was their overall percentage increase from 2007 through2008?