Physics Help Forum Drawing phasor diagrams when x is the sum of two Cos terms

 Periodic and Circular Motion Periodic and Circular Motion Physics Help Forum

 Nov 12th 2014, 07:44 AM #1 Junior Member   Join Date: Oct 2014 Posts: 8 Drawing phasor diagrams when x is the sum of two Cos terms If x= ACos(wt) + ACos(Wt), how do I draw a phasor diagram when t=2? Do I treat each cosine term as a vector, and then do vector addition? Thank you w=4*pi and W=5*pi, by the way
 Nov 13th 2014, 01:49 PM #2 Physics Team     Join Date: Jun 2010 Location: Morristown, NJ USA Posts: 2,333 At t = 2 the value of ACos(4 pi t ) is A, and the value of Acos(5 pi t ) is also A. So at t =2 the two phasors are aligned along the real axis, and so the vector addition gives a result of 2A along the real axis.

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