1.

(sin ^(3) theta - cos^(3) theta)/(sin theta - cos theta) - (cos theta)/(sqrt(1 + cot^(2)theta))-2 tan theta cot theta = - 1 , if

Answer»

`THETA in (0 (pi)/2)`
`theta in ((pi)/2 , pi)`
`theta in (pi, (3pi)/2)`
`theta in ((3pi)/2, 2 pi)`

ANSWER :B


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