Question 1089331
<font face="Times New Roman" size="+2">


The sign of the sine function is the same as the sign of the y-coordinate of a point in the quadrant containing the terminal ray of the argument of the function.  The sign of the cosine function is the same as the sign of the x-coordinate of a point in the quadrant containing the terminal ray of the argument of the function.


x-coordinates are positive in QI and QIV.  y-coordinates are positive in QI and QII


John
*[tex \LARGE e^{i\pi}\ +\ 1\ =\ 0]
My calculator said it, I believe it, that settles it
<img src="http://c0rk.blogs.com/gr0undzer0/darwin-fish.jpg">
*[tex \Large \ \
*[tex \LARGE \ \ \ \ \ \ \ \ \ \  


</font>