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Consider the cubic equation x^(3)-(1+cos theta+sin theta)x^(2)+(cos theta sin theta +cos theta + sin theta)x - sin theta cos theta =0. When roots are x_(1),x_(2) and x_(3). The value of x_(1)^(2)+x_(2)^(2)+x_(3)^(2) equals

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` 2 COS THETA `
` sin theta ( sin theta + cos theta)`

Answer :B


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