The highlighted in yellow is a mistake, right? I might be going insane. Where does the PI go?
Oct 1, 2013 #1 Turion 143 2 The highlighted in yellow is a mistake, right? I might be going insane. Where does the PI go? Attachments Selection_001.png 26.8 KB Views: 338
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Oct 1, 2013 #2 Office_Shredder Staff Emeritus Science Advisor Gold Member 4,162 322 [tex] \cos(4(t+\pi)) = \cos(4t+4\pi) = \cos(4t) [/tex]
Oct 1, 2013 #3 SteamKing Staff Emeritus Science Advisor Homework Helper 12,796 1,668 Remember, sin and cos are periodic functions with period 2k*pi, k = integer.
Oct 2, 2013 #4 Turion 143 2 @Office_Shredder: Opps. Nice catch. @SteamKing: Isn't the period 2pi/k where k is the coefficient of t?
@Office_Shredder: Opps. Nice catch. @SteamKing: Isn't the period 2pi/k where k is the coefficient of t?