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If z= r (cos theta + i sin theta), then...

If ` z= r (cos theta + i sin theta)`, then the value of `(z)/(bar(z)) + (bar(z))/(z)` is

A

`cos 2 theta`

B

`2 cos 2 theta`

C

`2 cos theta`

D

`2 sin theta`

Text Solution

Verified by Experts

The correct Answer is:
B
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