Question 619876
As &#952; increases from pi/2 to pi radians, cos&#952; <i><font color="red">decreases</font></i> from 0 to <i><font color="red">negative</font></i> 1. 
Have a look at the unit circle and you'll see that the x coordinates are negative here. 
So choice A is false.



As &#952; increases from pi/2 to pi radians, tan&#952; <i><font color="red">increases</font></i>. 
Again use the unit circle to see this. 
So choice B is false.