Two waves are identical apart from a phase difference, they create a resultant wave of 25% increase of the original amplitude, what is the phase difference.
sin(alpha)+sin(beta)=2sin(1/2)(alpha+beta)cos(1/2)(alpha-beta)
Asin(kx+wt)=2sin(1/2)(alpha+beta)cos(1/2)alpha-beta)
Asin(kx+wt)=2sin(1/2)(alpha+beta)cos(1/2)alpha-beta)
=1.2Asin(kx+wt)
I assume that's right then you rearrange but I'm highly doubting myself
sin(alpha)+sin(beta)=2sin(1/2)(alpha+beta)cos(1/2)(alpha-beta)
Asin(kx+wt)=2sin(1/2)(alpha+beta)cos(1/2)alpha-beta)
Asin(kx+wt)=2sin(1/2)(alpha+beta)cos(1/2)alpha-beta)
=1.2Asin(kx+wt)
I assume that's right then you rearrange but I'm highly doubting myself
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