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What is the principle argument of ( -1-i...

What is the principle argument of `( -1-i)` where `i = sqrt( - 1)`.

A

`( 5pi )/( 4)`

B

`- ( 5pi )/( 4)`

C

`( 3pi )/( 4)`

D

None of these

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The correct Answer is:
A
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