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For x in R, tanx+1/2tan""(1)/(2^(2))tan""(x)/(2^(2))+...+(1)/(2^(n-1))tan""((x)/(2^(n-1))) is equal to |
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Answer» `2cot2x-(1)/(2^(n-1))COS""((X)/(2^(n-1)))` |
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