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If : `cot theta =(a)/(b), "then" : a *cos 2 theta +b * sin 2 theta=` A)`a^(2) +b^(2)` B)`a^(2) - b^(2)` C)a D)bA. `a^(2) +b^(2)`B. `a^(2) - b^(2)`C. aD. b

Answer» Correct Answer - C


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