1.

यदि `x_(1),x_(2),x_(3),x_(4)` समीकरण `x^(4)-x^(3)sin2prop+x^(2)cos2prop` `-xcosprop-sinprop=0` के मूल है तो `tan^(-1)x_(1)+tan^(-1)x_(2)+tan^(-1)x_(3)+tan^(-1)x_(4)` का मान है-A. `prop`B. `90^(@)-prop`C. `180^(@)-prop`D. `270^(@)-prop`

Answer» Correct Answer - B


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