Find the minimum of abs(sin(x)+cos(x)+tan(x)+csc(x)+sec(x)+cot(x))

Find the minimum of abs(sin(x)+cos(x)+tan(x)+csc(x)+sec(x)+cot(x)), Putnam exam 2003, problem A3. ---------------------------------------- 💪 Support this channel and get my math notes by becoming a patron:   / blackpenredpen   🛍 Shop my math t-shirt & hoodies: https://amzn.to/3qBeuw6 ---------------------------------------- #blackpenredpen #math #calculus #apcalculus