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Using De Moivre 's theorem prove that : ...

Using De Moivre 's theorem prove that :
`((1+cos theta +i sin theta)/(1+cos theta - i sin theta))^n= cos n theta + i sin n theta`, where `i = sqrt(-1)`

A

2

B

4

C

6

D

8

Text Solution

Verified by Experts

The correct Answer is:
B
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