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CBSE Class 12 Math 2019 All India Set 1 Solved Paper

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Question : 14 of 29
Marks: +1, -0
If tan1xcot1x=tan1(  13),x>0\tan^{-1} x - \cot^{-1} x = \tan^{-1} \left( \; \frac{1}{\sqrt{3}} \right) , x>0, find the value of xx and hence find the value of sec1(  2x)\sec^{-1} \left( \; \frac{2}{x} \right).
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