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in Complex Numbers by (48.0k points)

If θ1 and θ2 are arguments of complex numbers z1 and z2 respectively then prove that:
z1\(\bar{z_2}\) + \(\bar{z_1}\)z2 = 2|z1||z2| cos(θ1 – θ2)

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Adding equation (i) and (ii) we get

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