A) Re \[({{z}_{1}}).\operatorname{Re}({{z}_{2}})\]
B) Re \[({{z}_{1}})\]. Im \[({{z}_{2}})\]
C) Im \[({{z}_{1}}).\operatorname{Re}\,({{z}_{2}})\]
D) None of these
Correct Answer: D
Solution :
If \[{{z}_{1}}\] and \[{{z}_{2}}\] be two complex number then Re \[({{z}_{1}}{{z}_{2}})=\operatorname{Re}({{z}_{1}})\operatorname{Re}({{z}_{2}})-\operatorname{Im}({{z}_{1}})\operatorname{Im}({{z}_{2}})\]
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