Sign for trig functions in quadrants

Author:
Mike Day
Topic:
Functions
This app will help you learn the SIGNS of the quadrants for the basic trig functions. Click on which trig function you want to view. Move point P so that you see the SIGN.
What is the sign for each: 1. sin x in quadrant IV? 2. cos x in quadrant III? 3. tan x in quadrant II? 4. csc x in quadrant I? 5. cot x in quadrant II? 6. Why is the sign of sin x positive in quadrants I and II?