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The principal solution cotx=-1 are...

The principal solution `cotx=-1` are

A

`(pi)/(4), (3pi)/(4)`

B

`(pi)/(4), (5pi)/(4)`

C

`(5pi)/(4), (7pi)/(4)`

D

`(3pi)/(4), (7pi)/(4)`

Text Solution

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The correct Answer is:
D
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