Physics

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Ey=E0sin(kx−ωt), Ez=4E0sin(kx−ωt),
the magnetic field can be written in the following way

B =[ sin(ωt+(−1)bBkx)(cBxˆ+dByˆ+eBzˆ)]
In other words: Bx=cBsin(ωt+(−1)bBkx), By=dBsin(ωt+(−1)bBkx), Bz=eBsin(ωt+(−1)bBkx)

Find :

dB . Express it in terms of E0, c
eB . Express it in terms of E0, c

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    plz help..

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