The problem is cos(-π/4+401π) is equal to (blank), if you don't understand, cos(-pi/4+401pi). I think the first step is cos(-π/4+(2x200)π+1)
Follow Math Help Forum on Facebook and Google+
Hey OfficeSnail. What is the rule about cos(x + pi) and cos(x + 2*pi) and how can you get cos(x + 400*pi + pi) in terms of cos(x) or sin(x)?
Look office snail, you can write .
View Tag Cloud