1.

What are the value of theta, between 0 and 2 pi, when tan theta = -1?

Answer»

`PI/4 and (3 pi)/4` only
`(3pi)/4 and (5 pi)/4` only
`(3pi)/4 and (7 pi)/4` only
`(5PI)/4 and (7 pi)/4` only

Answer :C


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