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## Main Question or Discussion Point

Hi,

suppose I have two vectors, one in the

The first vector

If we sum this vectos it results in one vector that have module and phase.

I found the module by

But what about the phase?

I think it was

suppose I have two vectors, one in the

*i*direction and the other in*j*direction,*i*is horizontal and*j*vertical.The first vector

*Vi = 5i*and the second vector*Vj = 2j*.If we sum this vectos it results in one vector that have module and phase.

I found the module by

*Vij = ( 5^2 + 2^2 ) ^ (1/2) = 5.3852*.But what about the phase?

I think it was

*atan(y/x)*, but in case*y=0*or*x=0*, it let me in troubles.