(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

See Attachment

2. Relevant equations

None I can think of

3. The attempt at a solution

I'm fairly certain that phi_yx is zero

Also I tried factoring out the cos and splitting up the equation into it's respective components, but to no avail. Am I even going about this correctly?

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# Parametric representation of a vector electric field

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