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If z = cosθ + isinθ, then z^2n -1 / z^2n + 1is equal to (n is an integer) ​

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+1 vote
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in Complex Numbers by (53.7k points)

If z = cosθ + isinθ, then \(\frac{z^{2n}-1}{z^{2n} + 1}\) is equal to (n is an integer)

a. i cot nθ

b. i tan nθ

c. tan nθ

d. cot nθ

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1 Answer

+1 vote
by (53.5k points)

Correct option is b. i tan nθ

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