(Cot 0 + CSC 0)(Cot 0 - CSC 0)
N nurseashely New member Joined Apr 29, 2009 Messages 1 Apr 29, 2009 #1 (Cot 0 + CSC 0)(Cot 0 - CSC 0)
L Loren Senior Member Joined Aug 28, 2007 Messages 1,299 Apr 29, 2009 #2 (a + b)(a - b) = a[sup:2esxwygo]2[/sup:2esxwygo] - b[sup:2esxwygo]2[/sup:2esxwygo]
