1.

Find the roots of the following cubic equations 2x^(3)-3x^(2) cos (A-B)-2 x cos^(2) (A+B)+ sin 2A sin 2 B cos (A-B)=0 .

Answer»


ANSWER :`2 COS A cos B, 2 SIN A sin B "and" -(1)/(2) cos (A-B)`.


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