C Thread Starter Cerkit Joined Jan 4, 2009 287 Nov 20, 2015 #1 Hi. Why is it that when adding two sine waves of same amplitude but out of phase is it 2 * Amplitude * sin(theta/2) How do I get to theta/2 Can someone point me to the derivation of this please? Thanks
Hi. Why is it that when adding two sine waves of same amplitude but out of phase is it 2 * Amplitude * sin(theta/2) How do I get to theta/2 Can someone point me to the derivation of this please? Thanks
Alec_t Joined Sep 17, 2013 11,892 Nov 20, 2015 #2 It comes from the trigonometric identity sin(A) + sin (B) =2* sin((A+B)/2) * cos ((A-B)/2)
