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If n is an integer and z=cis theta,(thet...

If n is an integer and `z=cis theta,(theta ne (2n+1)pi/2),` then show that `(z^(2n)-1)/(z^(2n)+1)=i tan n theta)`.

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AAKASH SERIES-DEMOIVRE'S THEOREM-EXERCISE - 6 (SHORT ANSWER QUESTIONS)
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