Please skectch each angle in standard position,and then determine the exact value of the trigonometric ratio?

Standard position means that the angle is measured from the x-axis (see illustration at a href="http://www.mathwords.com/s/standard_position.htm" rel="nofollow"http://www.mathwords.com/s/standard_posi…/a ). For the exact value, you can either use the unit circle (a href="http://www.math.pacificu.edu/~emmons/Math226_F08/UnitCircle.gif" rel="nofollow"http://www.math.pacificu.edu/~emmons/Mat…/a ) or a calculator. For example, the sin(3*pi/4) = sqrt(2)/2.