You can put this solution on YOUR website! tangent of the angle is equal to -6/8 which is equal to -.75
arc tangent of -.75 is equal to -36.86989765 degrees.
add 360 to that and you get the equivalent positive angle of 323.1301024 degrees.
that angle is between 270 and 360 degrees so it is in the fourth quadrant.
in the fourth quadrant since is minus and cosine is plus which makes tangent minus.
a picture of your angle is shown below:
