Thread: Differentiation of trigonometry equations
View Single Post
  #1  
Old June 27th, 2009, 11:08 AM
greghunter greghunter is offline
Junior Member
  
Join Date: Oct 2008
Location: Lewes, England
Posts: 35
Country:
Thanks: 28
Thanked 0 Times in 0 Posts
greghunter is on a distinguished road
Send a message via MSN to greghunter
Default Differentiation of trigonometry equations
Given that y=\cos2x + sin2x, find \frac{d^2y}{dx^2} and show that \frac{d^2y}{dx^2} + 4y = 0

Please help. I have tried to use the two trig calculus rules that I know but I can't seem to get them to work.
Reply With Quote