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If both roots of quadratic equation x^2+...

If both roots of quadratic equation `x^2+(sintheta+costheta)x+3/8=0` are positive and distinct then complete set of value of `theta` in `[0,2pi]` is (1)`(pi/(12),(5pi)/(12))` (2) `((13pi)/(12),(17pi)/(12)) (3)((7pi)/(12),(11pi)/(12))` (4) `((19pi)/(12),(23pi)/(12))`

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