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E-E-1-2-E-2-2-2E-1-E-2-cos2-1-2-full-explanation-




Question Number 47641 by azharkhan250963@gmail.com last updated on 12/Nov/18
E=(E_1 ^2 +E_2 ^2 +2E_1 E_2 cos2θ)^(1/2)   full explanation
$$\mathrm{E}=\left(\mathrm{E}_{\mathrm{1}} ^{\mathrm{2}} +\mathrm{E}_{\mathrm{2}} ^{\mathrm{2}} +\mathrm{2E}_{\mathrm{1}} \mathrm{E}_{\mathrm{2}} \mathrm{cos2}\theta\right)^{\mathrm{1}/\mathrm{2}} \\ $$$$\mathrm{full}\:\mathrm{explanation} \\ $$

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