Can you someone please help me with this question??? Simplify cot(x + pi)
Pre-Calc - Reiny, Sunday, May 22, 2011 at 4:48pm
you could do this ...
cot(x + pi)
cot(x+π) = 1/tan(x+π) ,
= 1/tanx , since x+π is in quadrant III and according to CAST, in III the tangent is positive.