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If |z1/z2|=1 and arg (z1z2)=0 , then ...

If `|z_1/z_2|=1` and `arg (z_1z_2)=0` , then a. `z_1 = z_2` b. `|z_2|^2 = z_1*z_2` `c. z_1*z_2 = 1` d. none of these

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CENGAGE ENGLISH-COMPLEX NUMBERS AND QUADRATIC EQUATIONS-All Questions
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  3. If |z1/z2|=1 and arg (z1z2)=0 , then a. z1 = z2 b. |z2|^2 = z1*z2 ...

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  20. If (sqrt(8)+i)^(50)=3^(49)(a+i b) , then find the value of a^2+b^2dot

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