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## Homework Statement

I have some attachements below from my textbook. According to it the value of resultant flux is constant in magnitude and 1.5 times the maximum value of flux.

But i have a doubt regarding how it is proved.

The magnetic flux waveforms are 120° apart from each other and at time 0, the instantaneous value of flux waveform of 1st phase is zero. Whereas 2nd phase has magnitude -√3/2.Φm and the third phase

**√3/2.Φm.The textbook says that:**

Φr = 2.(√3/2)Φm.cos60/2

Here is my doubt

Φr = 2.(√3/2)Φm.cos60/2

Here is my doubt

If the fluxes are 120° apart, shouldn't the equation be:

**Φr = 2.(√3/2)Φm.cos120/2 ?**Please explain me in the simple way how this works.i appreciate the help:) [/B]

## Homework Equations

I know that when forces have same magnitudes then for resultant force we use the formula:

R=2.F.cosΘ/2[/B]

## The Attempt at a Solution

I have been trying to think about it and draw a waveform to figure it out but couldn't understand it.