dexlex2001 Messages 2 Reaction score 0 Thread starter Oct 9, 2010 #1 Homework Statement tan^2(x/2)=(sec x-1)/(sec x+1) Homework Equations The Attempt at a Solution
Mark44 Mentor Insights Author Messages 38,144 Reaction score 10,740 Oct 9, 2010 #2 What have you tried? Before we can help you, you need to show an effort.